CN112465669A - Enterprise power load self-checking and adjusting system and method - Google Patents

Enterprise power load self-checking and adjusting system and method Download PDF

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CN112465669A
CN112465669A CN202011420147.8A CN202011420147A CN112465669A CN 112465669 A CN112465669 A CN 112465669A CN 202011420147 A CN202011420147 A CN 202011420147A CN 112465669 A CN112465669 A CN 112465669A
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吕世全
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
    • G06Q50/06—Electricity, gas or water supply
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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    • G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
    • G06Q10/063—Operations research, analysis or management
    • G06Q10/0639—Performance analysis of employees; Performance analysis of enterprise or organisation operations
    • G06Q10/06393—Score-carding, benchmarking or key performance indicator [KPI] analysis
    • 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
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications

Abstract

The invention discloses a system and a method for self-checking and adjusting an enterprise power load, wherein the system comprises a centralized control module for processing all data, a load monitoring module for monitoring a power grid terminal, and a balance conforming module for controlling according to the load monitoring module and the index of a contract power load; the transformer capacity monitoring module is used for monitoring the capacity in the unit; the device monitoring module is used for monitoring the electric equipment in the power grid; the power grid diagnosis module is used for detecting abnormal power utilization conditions of the power grid; and the power grid repairing module is used for repairing abnormal conditions in the power grid. The invention sets a floating range, the value of the floating range comprises contract load values, and the load value in the interval is the optimal power utilization scheme; when the power utilization state of the power utilization terminal exceeds the range, the load balancing module adjusts the power utilization state of the power utilization terminal.

Description

Enterprise power load self-checking and adjusting system and method
The original application of the divisional application is an invention application, the application number of the original application is 2016103821470, the name of the invention is an enterprise power load self-checking and adjusting system and method, and the application date is 2017, 08, month and 24
Technical Field
The invention relates to the field of electric quantity management, in particular to a system and a method for self-checking and adjusting an enterprise power load.
Background
The MD-contract power load, also called 'maximum demand' (unit: kW), refers to the maximum value of the average load of power consumption per unit time in a period for settling the power charge of a client. And is the maximum active power value at which the power consumer uses the electric energy at a certain time. The contract load management directly reflects the management level of the power utilization of the enterprise, and the larger the difference between the actual power utilization load and the contract power utilization load is, the higher the power utilization cost is. Below the contracted load, the basic electricity charge of the surplus portion is paid more, and above the contracted load, the charge is doubled at the higher portion.
Therefore, for actual enterprises and users, the enterprise power load needs to be self-checked in real time, controlled within the contractual power load, and automatically adjusted to the power grid according to the change of the power consumption.
In view of the above-mentioned drawbacks, the present inventors have finally obtained the present creation through a long period of research and practice.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a system and a method for self-checking and adjusting an enterprise power load.
In order to achieve the purpose, the invention adopts the following technical scheme: an enterprise power load self-checking and adjusting system comprises a centralized control module for processing data, a load monitoring module for monitoring a power grid terminal, and a balance conforming module for controlling according to the load monitoring module and the index of a contract power load;
the transformer capacity monitoring module is used for monitoring the capacity in the unit;
the device monitoring module is used for monitoring the electric equipment in the power grid;
the power grid diagnosis module is used for detecting abnormal power utilization conditions of the power grid; the power grid restoration module is used for correspondingly restoring abnormal conditions in the power grid; when the actual electricity consumption is far lower than the contract load, the abnormal condition in the power grid needs to be detected through the power grid diagnosis module, so that the user is prevented from paying the electricity consumption far higher than the actual electricity consumption.
The power consumption calculation module is used for calculating the power consumption before and after adjustment according to the actual use condition of the power grid, and finally evaluating the adjusted power saving condition;
the load monitoring module is used for acquiring the useful power of the power utilization terminal in real time, acquiring the load service condition of the power utilization terminal and adopting the load average value in a certain time period;
the load monitoring module takes continuous N each time during sampling1One period, sample M1Secondly, a transient value I is taken in each period, and the value I is calculated according to the following formulam，
Figure BDA0002819392360000011
Wherein I represents a transient value in an arbitrary period, Im0kIs represented in N1Average amplitude of current in one cycle, ImRepresenting the calculated current amplitude, N1Denotes each sampling period, M1Indicating the number of samples and w the signal transmission frequency.
The current amplitude I in the period range is obtained through the calculationmSince the voltage of the determined power supply time is constant at the determined power supply terminal, the actual load value is calculated by using the linear relationship between the power and the current;
the load monitoring module transmits the acquired actual load to the centralized control module and compares the actual load with a standard preset contract load;
when the actual load exceeds the optimal range, the system collects the capacity information of each transformer and switches the capacity information to the transformer with the optimal capacity space; and when the reagent load is far lower than the optimal range of the contract load, the equipment monitoring module and the power grid diagnosis module diagnose the whole power grid and judge whether a fault occurs. In the diagnosis process, the current and the voltage of the power utilization terminal and the power grid line are respectively detected, whether abnormality exists is judged, and at the position where the abnormality exists, the system firstly carries out temporary repair to ensure that the actual load in a short time is in the optimal range; and then, checking and repairing.
Furthermore, an even number of m capacitance acquisition sensors are arranged in the power grid system, m is larger than or equal to 6, two capacitance acquisition sensors are arranged in the same power terminal, like a transformer, and the two capacitance acquisition sensors in the same power terminal are in the same group.
The centralized control module comprises a data acquisition module, a comparison module, a storage module and a logic control module, wherein the data acquisition module acquires current signals in the capacitance acquisition sensors and transmits the current signals to the comparison module; the data acquisition module comprises a grouping unit which groups and arranges the currents of two capacitance acquisition sensors arranged in the adjacent regions, and the capacitance detection information forms m/2 groups of two-dimensional current matrixes respectively.
The comparison unit judges the actual capacitance of each two groups in the m/2 groups of two-dimensional current matrixes, transmits the result to the logic control module, and calculates the actual capacitance P of the first two groups and the actual capacitance P of the second two groups according to the following formula21，
Figure BDA0002819392360000021
In the formula, P21Representing the actual capacitance, i, of each two sets of currents1And i2Respectively representing current values, i, of a first set of two-dimensional current matrices1Representing the sampled value of the first capacitive pick-up sensor, i2Representing a sampled value of a second capacitive pickup sensor; i.e. i3And i4Respectively representing current values, i, of a second set of two-dimensional current matrices3Representing the sampled value of a third capacitive pick-up sensor, i4Representing a sample value of a fourth capacitive pickup sensor; t represents a mean square error operation, and I represents an integral operation;
a rated capacitance threshold value P is arranged in the storage module0(ii) a The logic control module calculates the absolute value difference of two actual capacitances obtained by calculation and a rated capacitance threshold value P0Comparing, and if the difference value of the absolute values of the actual capacitances is smaller than a threshold value, judging that the capacitances at the positions of the two groups of capacitance acquisition sensors have certain space capacity; all calculateThe obtained actual capacitance is respectively equal to the actual capacitance threshold value P0And comparing, and judging that the capacitance space capacity detected in a certain group of capacitance acquisition sensors is the maximum.
Further, the power grid repair module repairs according to the power consumption condition of the abnormal position, a reverse terminal power consumption repair mode is adopted, the power grid repair module comprises a sampling unit which samples signals from the time when the fault occurs to the time interval t of the self-healing time, and the average distribution is N within the time interval t2Intervals, within each interval, selecting M2For a complete waveform, selecting X intermittently during each cycle2Dots for recording instantaneous current value i of each dot0。
The signal processing unit is used for correcting the signal according to preset parameters and sending the signal to the correction circuit; a correction circuit that generates a corrected signal waveform;
the signal processing unit corrects each selected point according to the following formula (2);
im＝ρ×i0 (2)
wherein imRepresents the instantaneous current value of the sample point after correction, p represents the correction coefficient, i0Representing the instantaneous current value of the sampling point; the correction coefficient ρ is calculated according to the following formula (3), and its value is determined by the failure position;
Figure BDA0002819392360000031
where ρ represents a correction coefficient, i01And i02And the instantaneous current sampling values of two points at the fault position when the fault occurs are shown, N represents the sampling times, and k represents the sampling sequence.
Further, the centralized control module determines a simulated electricity rate usage calculated according to the adjusted load usage through the electric quantity calculation module, and the adjustment is appropriate if the simulated electricity rate usage and the actual electricity rate usage can be within a determined error range.
The invention also provides a management method for enterprise power load analysis and maximum demand,
the load monitoring module monitors the power grid terminal and is a balance-conforming module which controls according to the load monitoring module and the index of the contract power load;
the centralized control module processes the acquired data;
the load monitoring module is used for acquiring the useful power of the power utilization terminal in real time, acquiring the load service condition of the power utilization terminal and adopting the load average value in a certain time period; the load monitoring module transmits the acquired actual load to the centralized control module and compares the actual load with a standard preset contract load;
when the actual load exceeds the optimal range, the system collects the capacity information of each transformer and switches the capacity information to the transformer with the optimal capacity space; and when the reagent load is far lower than the optimal range of the contract load, the equipment monitoring module and the power grid diagnosis module diagnose the whole power grid and judge whether a fault occurs. In the diagnosis process, the current and the voltage of the power utilization terminal and the power grid line are respectively detected, whether abnormality exists is judged, and at the position where the abnormality exists, the system firstly carries out temporary repair to ensure that the actual load in a short time is in the optimal range; and then, checking and repairing.
Compared with the prior art, the invention has the beneficial effects that: the present invention sets a floating range, the value of the floating range includes a contract load value, and the load value in the interval is an optimal power utilization scheme. When the power utilization state of the power utilization terminal exceeds the range, the load balancing module adjusts the power utilization state of the power utilization terminal.
When the actual load exceeds the optimal range, the system collects the capacity information of each transformer, and switches to the transformer with the optimal capacity space when the reagent load is far lower than the optimal range of the contract load, and the equipment monitoring module and the power grid diagnosis module diagnose the whole power grid and judge whether a fault occurs. In the diagnosis process, the current and the voltage of the power utilization terminal and the power grid line are respectively detected, whether abnormality exists is judged, and at the position where the abnormality exists, the system firstly carries out temporary repair to ensure that the actual load in a short time is in the optimal range; and then, checking and repairing.
After the maintenance in a short time, the overhigh electricity charge value caused by the load detection in the time is avoided; therefore, the system can avoid the sudden increase of the electric charge caused by long-time fault risk.
The electric quantity calculation module of the invention is used as a final inspection module to ensure that the management method of the invention is effective and can be practically applied.
Drawings
Fig. 1 is a functional block diagram of an enterprise power load self-checking and regulating system according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Please refer to fig. 1, which is a functional block diagram of an enterprise power load self-checking and adjusting system, the system of the present invention includes a centralized control module for processing each data, a load monitoring module for monitoring a power grid terminal, and a compliance balancing module for controlling according to the load monitoring module and an index of a contract power load;
the transformer capacity monitoring module is used for monitoring the capacity in the unit;
the device monitoring module is used for monitoring the electric equipment in the power grid;
the power grid diagnosis module is used for detecting abnormal power utilization conditions of the power grid; the power grid restoration module is used for correspondingly restoring abnormal conditions in the power grid; when the actual electricity consumption is far lower than the contract load, the abnormal condition in the power grid needs to be detected through the power grid diagnosis module, so that the user is prevented from paying the electricity consumption far higher than the actual electricity consumption.
The power saving system further comprises an electric quantity calculating module, the electric quantity calculating module is used for calculating the electric quantity use condition before and after adjustment according to the actual use condition of the power grid, and finally the adjusted power saving condition is evaluated.
The load monitoring module of the embodiment acquires the load service condition of the power consumption terminal by acquiring the useful power of the power consumption terminal in real time. Since the evaluation criterion adopted by the contract load is the determined average value of the load in a certain period of time, in this embodiment, the average value of the load in a certain period of time is also used to obtain the use condition of the actual load.
The load monitoring module takes continuous N each time during sampling1One period, sample M1Secondly, a transient value I is taken in each period, and the value I is calculated according to the following formulam，
Figure BDA0002819392360000041
Wherein I represents a transient value in an arbitrary period, Im0kIs represented in N1Average amplitude of current in one cycle, ImRepresenting the calculated current amplitude, N1Denotes each sampling period, M1Indicating the number of samples and w the signal transmission frequency.
The current amplitude I in the period range is obtained through the calculationmSince the voltage at a certain power supply terminal is constant for a certain power supply time, the actual load value is calculated by using a linear relationship between the power and the current.
The load monitoring module transmits the acquired actual load to the centralized control module, and the actual load is compared with a standard preset contract load, so that the actual power utilization condition can be determined; in this embodiment, a floating range is set, the value of the floating range includes a contract load value, and the load value in this interval is the optimum power consumption plan. And when the power utilization state exceeds the range, the load balancing module adjusts the power utilization condition of the power utilization terminal.
When the actual load exceeds the optimal range, the system collects the capacity information of each transformer and switches the capacity information to the transformer with the optimal capacity space; in the power utilization process of an actual terminal, an even number m of capacitance acquisition sensors are arranged in a power grid system, m is larger than or equal to 6, two capacitance acquisition sensors are arranged in the same power terminal like a transformer, and the two capacitance acquisition sensors in the same power terminal are in the same group.
The centralized control module comprises a data acquisition module, a comparison module, a storage module and a logic control module, wherein the data acquisition module acquires current signals in the capacitance acquisition sensors and transmits the current signals to the comparison module; the data acquisition module comprises a grouping unit which groups and arranges the currents of two capacitance acquisition sensors arranged in the adjacent regions, and the capacitance detection information forms m/2 groups of two-dimensional current matrixes respectively.
The comparison unit judges the actual capacitance of each two groups in the m/2 groups of two-dimensional current matrixes, transmits the result to the logic control module, and calculates the actual capacitance P of the first two groups and the actual capacitance P of the second two groups according to the following formula21，
Figure BDA0002819392360000051
In the formula, P21Representing the actual capacitance, i, of each two sets of currents1And i2Respectively representing current values, i, of a first set of two-dimensional current matrices1Representing the sampled value of the first capacitive pick-up sensor, i2Representing a sampled value of a second capacitive pickup sensor; i.e. i3And i4Respectively representing current values, i, of a second set of two-dimensional current matrices3Representing the sampled value of a third capacitive pick-up sensor, i4Representing a sample value of a fourth capacitive pickup sensor; t denotes the mean square error operation and I denotes the integration operation.
The comparison unit calculates the actual capacitance P of the first and third two-dimensional current matrixes according to the following formula31，
Figure BDA0002819392360000052
In the formula, P31Representing the actual capacitance, i, of each two sets of currents1And i2Respectively representing current values, i, of said first set of two-dimensional current matrices1Representing the sampled value of the first capacitive pick-up sensor, i2Representing a sampled value of a second capacitive pickup sensor; i.e. i5And i6Respectively representing current values, i, of said third set of two-dimensional current matrices5Representing the sampled value of the fifth capacitive pick-up sensor, i6Representing a sampling value of a sixth capacitive pickup sensor; t denotes the mean square error operation and I denotes the integration operation.
The comparison unit calculates the actual capacitance P of the second two-dimensional current matrix and the third two-dimensional current matrix according to the following formula32，
Figure BDA0002819392360000053
In the formula, P32Representing the actual capacitance, i, of each two sets of currents3And i4Respectively representing current values, i, of said second set of two-dimensional current matrices3Representing the sampled value of the first capacitive pick-up sensor, i4Representing a sampled value of a second capacitive pickup sensor; i.e. i5And i6Respectively representing current values, i, of said third set of two-dimensional current matrices5Representing the sampled value of the fifth capacitive pick-up sensor, i6Representing a sampling value of a sixth capacitive pickup sensor; t denotes the mean square error operation and I denotes the integration operation.
A rated capacitance threshold value P is arranged in the storage module0(ii) a The logic control module calculates the absolute value difference of two actual capacitances obtained by calculation and a rated capacitance threshold value P0Comparing, and if the difference value of the absolute values of the actual capacitances is smaller than a threshold value, judging that the capacitances at the positions of the two groups of capacitance acquisition sensors have certain space capacity; all the calculated actual capacitances are compared with the actual capacitancesThreshold value of capacitance P0And comparing, and judging that the capacitance space capacity detected in a certain group of capacitance acquisition sensors is the maximum.
And when the reagent load is far lower than the optimal range of the contract load, the equipment monitoring module and the power grid diagnosis module diagnose the whole power grid and judge whether a fault occurs. In the diagnosis process, the current and the voltage of the power utilization terminal and the power grid line are respectively detected, whether abnormality exists is judged, and at the position where the abnormality exists, the system firstly carries out temporary repair to ensure that the actual load in a short time is in the optimal range; and then, checking and repairing.
The power grid repairing module repairs according to the power utilization condition of the abnormal position, a reverse repairing mode of terminal power utilization is adopted, the power grid repairing module comprises a sampling unit, the sampling unit samples signals from the moment when a fault occurs to the time interval t of the self-healing moment, and the average distribution is N within the time interval t2Intervals, within each interval, selecting M2For a complete waveform, selecting X intermittently during each cycle2Dots for recording instantaneous current value i of each dot0。
The signal processing unit is used for correcting the signal according to preset parameters and sending the signal to the correcting circuit; and a correction circuit for generating a corrected signal waveform.
The signal processing unit corrects each selected point according to the following formula (4);
im＝ρ×i0 (4)
wherein imRepresents the instantaneous current value of the sample point after correction, p represents the correction coefficient, i0Representing the instantaneous current value of the sampling point; the correction coefficient ρ is calculated by the following formula (5), and its value is determined by the failure position.
Figure BDA0002819392360000061
Where ρ represents a correction coefficient, i01And i02And the instantaneous current sampling values of two points at the fault position when the fault occurs are shown, N represents the sampling times, and k represents the sampling sequence.
The signal correction module is used for retransmitting a corrected signal by combining information at a fault point, the signal correction takes current as a basis, and a correction coefficient is used for correcting the current, so that the signal restoration has higher accuracy.
After the maintenance in a short time, the overhigh electricity charge value caused by the load detection in the time is avoided; therefore, the system can avoid the sudden increase of the electric charge caused by long-time fault risk.
After the adjustment is completed, the centralized control module determines the simulated electricity charge usage calculated according to the adjusted load usage through the electricity quantity calculation module, and the adjustment is proper if the electricity charge calculated through the simulation and the actual electricity charge usage can be within a determined error range. If the difference is larger, the adjustment is needed again.
The electric quantity calculation module of the invention is used as a final inspection module to ensure that the management method of the invention is effective and can be practically applied.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (6)

1. The enterprise power load self-checking and adjusting system is characterized by comprising a centralized control module for processing all data, a load monitoring module for monitoring a power grid terminal, and a balance conforming module for controlling according to the load monitoring module and the index of a contract power load;
the transformer capacity monitoring module is used for monitoring the capacity in the unit;
the device monitoring module is used for monitoring the electric equipment in the power grid;
the power grid diagnosis module is used for detecting abnormal power utilization conditions of the power grid; the power grid restoration module is used for correspondingly restoring abnormal conditions in the power grid; when the actual electricity consumption is far lower than the contract load, the abnormal condition in the power grid needs to be detected through the power grid diagnosis module, so that the user is prevented from paying the electricity consumption far higher than the actual electricity consumption.
The power consumption calculation module is used for calculating the power consumption before and after adjustment according to the actual use condition of the power grid, and finally evaluating the adjusted power saving condition;
the load monitoring module is used for acquiring the useful power of the power utilization terminal in real time, acquiring the load service condition of the power utilization terminal and adopting the load average value in a certain time period;
the load monitoring module takes continuous N each time during sampling1One period, sample M1Secondly, a transient value I is taken in each period, and the value I is calculated according to the following formulam，
Figure FDA0002819392350000011
Wherein I represents a transient value in an arbitrary period, Im0kIs represented in N1Average amplitude of current in one cycle, ImRepresenting the calculated current amplitude, N1Denotes each sampling period, M1Indicating the number of samples and w the signal transmission frequency.
The current amplitude I in the period range is obtained through the calculationmSince the voltage of the determined power supply time is constant at the determined power supply terminal, the actual load value is calculated by using the linear relationship between the power and the current;
the load monitoring module transmits the acquired actual load to the centralized control module and compares the actual load with a standard preset contract load;
when the actual load exceeds the optimal range, the system collects the capacity information of each transformer and switches the capacity information to the transformer with the optimal capacity space; and when the reagent load is far lower than the optimal range of the contract load, the equipment monitoring module and the power grid diagnosis module diagnose the whole power grid and judge whether a fault occurs. In the diagnosis process, the current and the voltage of the power utilization terminal and the power grid line are respectively detected, whether abnormality exists is judged, and at the position where the abnormality exists, the system firstly carries out temporary repair to ensure that the actual load in a short time is in the optimal range; and then, checking and repairing.
2. The system for self-checking and adjusting of enterprise power loads according to claim 1, wherein an even number m of capacitance collection sensors are arranged in the power grid system, m is larger than or equal to 6, two capacitance collection sensors are arranged in the same power terminal as a transformer, and the two capacitance collection sensors in the same power terminal are in the same group.
The centralized control module comprises a data acquisition module, a comparison module, a storage module and a logic control module, wherein the data acquisition module acquires current signals in the capacitance acquisition sensors and transmits the current signals to the comparison module; the data acquisition module comprises a grouping unit which groups and arranges the currents of two capacitance acquisition sensors arranged in the adjacent regions, and the capacitance detection information forms m/2 groups of two-dimensional current matrixes respectively.
The comparison unit judges the actual capacitance of each two groups in the m/2 groups of two-dimensional current matrixes, transmits the result to the logic control module, and calculates the actual capacitance P of the first two groups and the actual capacitance P of the second two groups according to the following formula21，
Figure FDA0002819392350000021
In the formula, P21Representing the actual capacitance, i, of each two sets of currents1And i2Respectively representing current values, i, of a first set of two-dimensional current matrices1Representing a first capacitanceSampling values of the collection sensor i2Representing a sampled value of a second capacitive pickup sensor; i.e. i3And i4Respectively representing current values, i, of a second set of two-dimensional current matrices3Representing the sampled value of a third capacitive pick-up sensor, i4Representing a sample value of a fourth capacitive pickup sensor; t represents a mean square error operation, and I represents an integral operation;
a rated capacitance threshold value P is arranged in the storage module0(ii) a The logic control module calculates the absolute value difference of two actual capacitances obtained by calculation and a rated capacitance threshold value P0Comparing, and if the difference value of the absolute values of the actual capacitances is smaller than a threshold value, judging that the capacitances at the positions of the two groups of capacitance acquisition sensors have certain space capacity; all the calculated actual capacitances are respectively compared with an actual capacitance threshold value P0And comparing, and judging that the capacitance space capacity detected in a certain group of capacitance acquisition sensors is the maximum.
3. The system according to claim 2, wherein the grid restoration module restores the power consumption situation at the abnormal position in a reverse terminal power consumption restoration manner, and the grid restoration module includes a sampling unit for sampling the signal from the fault occurrence time to the self-healing time within a time interval t, where the average distribution is N2Intervals, within each interval, selecting M2For a complete waveform, selecting X intermittently during each cycle2Dots for recording instantaneous current value i of each dot0。
4. The system according to claim 3, further comprising the signal processing unit, which modifies the signal according to preset parameters and sends the modified signal to the modification circuit; a correction circuit that generates a corrected signal waveform;
the signal processing unit corrects each selected point according to the following formula (2);
im＝ρ×i0 (2)
wherein imRepresents the instantaneous current value of the sample point after correction, p represents the correction coefficient, i0Representing the instantaneous current value of the sampling point; the correction coefficient ρ is calculated according to the following formula (3), and its value is determined by the failure position;
Figure FDA0002819392350000022
where ρ represents a correction coefficient, i01And i02And the instantaneous current sampling values of two points at the fault position when the fault occurs are shown, N represents the sampling times, and k represents the sampling sequence.
5. The system according to claim 3, wherein the centralized control module determines the simulated electricity usage calculated according to the adjusted load usage through the electricity calculation module, and the adjustment is appropriate if the simulated calculated electricity usage and the actual electricity usage can be within a certain error range.
6. A self-checking and adjusting method for enterprise power load is characterized in that,
the load monitoring module monitors the power grid terminal and is a balance-conforming module which controls according to the load monitoring module and the index of the contract power load;
the centralized control module processes the acquired data;
the load monitoring module is used for acquiring the useful power of the power utilization terminal in real time, acquiring the load service condition of the power utilization terminal and adopting the load average value in a certain time period; the load monitoring module transmits the acquired actual load to the centralized control module and compares the actual load with a standard preset contract load;
when the actual load exceeds the optimal range, the system collects the capacity information of each transformer and switches the capacity information to the transformer with the optimal capacity space; and when the reagent load is far lower than the optimal range of the contract load, the equipment monitoring module and the power grid diagnosis module diagnose the whole power grid and judge whether a fault occurs. In the diagnosis process, the current and the voltage of the power utilization terminal and the power grid line are respectively detected, whether abnormality exists is judged, and at the position where the abnormality exists, the system firstly carries out temporary repair to ensure that the actual load in a short time is in the optimal range; and then, checking and repairing.
CN202011420147.8A 2016-06-01 2016-06-01 Enterprise power load self-checking and adjusting system and method Withdrawn CN112465669A (en)

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CN111367348A (en) * 2020-03-20 2020-07-03 温岭市非普电气有限公司 Electrical equipment voltage control method and system

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CN101630840B (en) * 2009-08-12 2011-06-08 电子科技大学 Intelligent control system for microgrid energy
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CN101826755B (en) * 2010-05-11 2012-08-29 羿宝存 Intelligent power distribution network and power-consumption real-time monitoring and managing system
CN102376026B (en) * 2011-10-31 2015-08-05 冶金自动化研究设计院 Industrial enterprise power utilization load optimizing system
CN103490511B (en) * 2013-09-13 2015-08-05 北京师范大学 A kind of power distribution network communication terminal detection system and method
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CN113327179A (en) * 2021-06-30 2021-08-31 广东诚誉工程咨询监理有限公司 Quality inspection monitoring system based on power grid big data quality standardization
CN113327179B (en) * 2021-06-30 2022-04-12 广东诚誉工程咨询监理有限公司 Quality inspection monitoring system based on power grid big data quality standardization

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