CN204515015U - Conservation of power electricity measuring and calculating device before and after a kind of transformer transformation - Google Patents

Abstract

The utility model discloses a power saving measuring and calculating device before and after transformation of a transformer, which belongs to the technical field of transformation of transformers. It includes an electric energy measurement and analysis unit, a data acquisition unit, a first communication module and a second communication module. The electric energy measurement and analysis unit includes a current transformer, a voltage transformer and an electric energy meter; the electric energy meter is based on received current data and voltage data according to P =U×I×cosΦ is calculated to obtain the electric energy data; the first communication module is arranged on one side of the electric energy meter, the second communication module is arranged on one side of the data acquisition unit, and the electric energy meter passes the communication between the first communication module and the second communication module , to send the electric energy data to the data acquisition unit; among them, P—electric power/W, U—voltage/V, I—current/A, Φ—phase angle between U and I. The device does not need to install metering devices on both the high and low voltage sides of the transformer. Therefore, it is convenient to implement in the transformation project of the transformer.

Description

A device for measuring and calculating power saving before and after transformation of transformers

technical field

The utility model relates to the technical field of transformation of transformers, in particular to a measuring and calculating device and method for saving electric power before and after transformation of transformers.

Background technique

With the influence of my country's rapid economic development and economic structural adjustment and other factors, my country's power consumption structure and supply and demand situation continue to change, the maximum load of the power grid continues to grow rapidly, the peak-to-valley difference increases, and the requirements for power supply reliability continue to increase. In 2011, the National Development and Reform Commission issued the "Power Grid Enterprises Implementation of Power Demand Side Management Target Responsibility Assessment Program (Trial)", requiring the establishment and improvement of power grid companies' power demand side management target responsibility evaluation and assessment system to ensure the realization of the 0.3% reduction in electricity consumption. Since my country's energy-saving industry is still in its infancy, there is currently a lack of unified and effective measurement methods for saving electricity. In the transformation of energy-saving projects in power grid enterprises, the transformation of high-loss transformers accounts for a large proportion. Therefore, it is urgent to design a scientific and reasonable method for measuring and calculating the power saved by transformer transformation.

In order to solve the above-mentioned problems, the Chinese invention patent application with the application publication number CN103018584A discloses a measurement and verification method for power boosting transformation to save power and electricity. It calculates the power saving and power consumption of the project by measuring the parameters before and after the project boundary boost transformation, and provides a reliable basis for energy saving benefits. The method includes steps: 1) demarcating the project boundary before power step-up transformation; 2) determining the statistical report period of the project; 3) determining the static parameters of components before and after the step-up transformation within the project boundary, and using testing equipment to collect 4) Establish a mathematical model for saving electricity and electricity, and calculate the energy saving and electricity of the project.

However, the measurement and verification method used for power boosting transformation to save power and electricity needs to install metering devices on both the high and low voltage sides of the transformer. However, in the actual transformer transformation project, the transformer usually only installs a metering device on one side of the transformer high and low voltage, and does not reserve a metering device installation position on the opposite side The measurement and verification methods for saving power and electricity in power step-up transformation are applied in the transformer transformation project, and the transformer itself needs to be greatly modified, otherwise, it is difficult to implement it in the transformer transformation project.

Utility model content

In order to solve the above problems, the utility model proposes a measuring and calculating device and method for saving electric power before and after the transformation of the transformer, which can be implemented in the transformation project of the transformer.

The utility model provides a measuring and calculating device for saving electric power before and after transformation of a transformer, including an electric energy measurement and analysis unit, a data acquisition unit, a first communication module and a second communication module, and the electric energy measurement and analysis unit includes a current transformer, a voltage transformer and an electric energy meter ,

The current transformer is used to measure the current flowing through the high and low voltage bus bars of the transformer, and send the measured current data to the electric energy meter;

The voltage transformer is used to measure the voltage of the high bus or low voltage bus of the transformer, and send the measured voltage data to the electric energy meter;

The electric energy meter calculates the electric energy data according to the received current data and voltage data according to P=U×I×cosΦ;

The first communication module is set on the side of the electric energy meter, the second communication module is set on the side of the data acquisition unit, and the electric energy meter is connected through the communication between the first communication module and the second communication module. communicating, sending the electric energy data to the data acquisition unit;

in,

P—electric power/W, U—voltage/V, I—current/A, Φ—phase angle between U and I.

Preferably, the data acquisition unit is provided with a data display, and the data display is used to display the electric energy data in real time.

As a preference, the power saving measurement and calculation device before and after the transformation of the transformer also includes a measurement and analysis unit and an output terminal,

The metering and analysis unit calculates and obtains the power saving before and after the transformation of the transformer according to the electric energy data collected by the data acquisition unit;

The output terminal is used to output the power saved before and after the transformation of the transformer.

Preferably, the data acquisition unit, measurement analysis unit, and output terminal are all split devices.

Preferably, the data collection unit and the measurement analysis unit are integrated devices, and the output terminal is separated from the integrated data collection unit and measurement analysis unit.

Preferably, the metering analysis unit and output terminal are integrated devices, and the data collection unit is separated from the integrated metering analysis unit and output terminal.

Preferably, the data transmission between the metering analysis unit and the output terminal is carried out through bluetooth technology.

Preferably, the metering analysis unit and the output terminal are respectively provided with a wired or wireless remote interface, and the metering analysis unit performs data transmission through the remote interface.

Preferably, wired communication is adopted between the first communication module and the second communication module; or, wireless communication is adopted between the first communication module and the second communication module.

As a preference, the communication protocol between the first communication module and the second communication module is selected from the DL/645-2007 multifunctional electric energy meter communication protocol.

The utility model provides the power saving measuring and calculating device before and after the transformation of the transformer, which can obtain the electric energy data through the electric energy meter, and through the communication between the first communication module arranged on the side of the electric energy meter and the second communication module arranged on the side of the data acquisition unit , the data acquisition unit can collect the electric energy data, and according to the electric energy data, the staff can calculate the power saving before and after the transformation of the transformer. There is no need to install metering devices on both the high and low voltage sides of the transformer. Therefore, it is convenient to implement in the transformation project of the transformer.

Description of drawings

Fig. 1 is a logic block diagram of the power saving measuring and calculating device before and after the transformation of the transformer provided by the embodiment of the utility model.

Detailed ways

In order to deeply understand the utility model, the utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Embodiment one

Referring to accompanying drawing 1, the measuring and calculating device for saving electric power before and after the transformation of the transformer provided by the utility model includes an electric energy measurement and analysis unit, a data acquisition unit, a first communication module and a second communication module, and the electric energy measurement and analysis unit includes a current transformer and a voltage transformer and energy meter. The current transformer is used to measure the current flowing through the high and low voltage bus bars of the transformer, and send the measured current data to the energy meter. The voltage transformer is used to measure the voltage of the high-voltage bus or low-voltage bus of the transformer, and send the measured voltage data to the energy meter. The electric energy meter calculates the electric energy data according to the received current data and voltage data according to P=U×I×cosΦ. The first communication module is set on the side of the electric energy meter, and the second communication module is set on the side of the data acquisition unit. The electric energy meter sends the electric energy data to the data acquisition unit through the communication between the first communication module and the second communication module. Among them, P—electric power/W, U—voltage/V, I—current/A, Φ—phase angle between U and I.

The utility model provides the power saving measuring and calculating device before and after the transformation of the transformer, which can obtain the electric energy data through the electric energy meter, and through the communication between the first communication module arranged on the side of the electric energy meter and the second communication module arranged on the side of the data acquisition unit , the data acquisition unit can collect the electric energy data, and according to the electric energy data, the staff can calculate the power saving before and after the transformation of the transformer. There is no need to install metering devices on both the high and low voltage sides of the transformer. Therefore, it is convenient to implement in the transformation project of the transformer.

Wherein, the data acquisition unit is provided with a data display, and the data display is used for real-time display of electric energy data. At this time, according to the real-time power data displayed on the data display, the staff can select the appropriate power data value according to actual needs, and then calculate the power saved before and after the transformation of the transformer.

The disadvantage is that since the data display shows real-time power data, the staff need to read the data display according to the needs, and then calculate the power saving before and after the transformation of the transformer according to the reading results, resulting in a waste of human resources.

Embodiment two

The difference from the power saving measurement and calculation device before and after the transformation of the transformer provided by the first embodiment of the utility model is that the power saving and calculation device before and after the transformation of the transformer provided by the second embodiment of the utility model also includes a measurement analysis unit and an output terminal. The metering analysis unit calculates the power saving before and after the transformation of the transformer according to the electric energy data collected by the data acquisition unit. The output terminal is used to save power before and after the transformation of the output transformer. At this time, since the electric energy data is directly transmitted from the data acquisition unit to the measurement and analysis unit, and output by the output terminal, the power saved before and after the transformation of the transformer can be obtained from the output terminal without the need for the staff to read the data acquisition unit. Therefore, it can Save human resources.

In this embodiment, the data acquisition unit, measurement analysis unit, and output terminal are all split devices. The advantage of using a split device is that the data acquisition unit, measurement analysis unit and output terminal can be purchased separately and designed separately. When one of the devices needs to be replaced or repaired, it is easy to replace or repair; the disadvantage is that three devices need to be selected at the same time. Split device, inconvenient to install.

Embodiment Three

The difference from the power saving measurement and calculation device before and after the transformation of the transformer provided by the second embodiment of the utility model is that in the power saving measurement and calculation device before and after the transformation of the transformer provided by the third embodiment of the utility model, the data acquisition unit and the measurement analysis unit are integrated Type device, the output terminal is separated from the integrated data acquisition unit and measurement analysis unit. At this time, the data acquisition unit and the measurement and analysis unit in the original three separate devices are integrated together, reducing one device, and the installation is more convenient than the power saving measurement device before and after the transformation of the transformer provided by the second embodiment of the utility model. Moreover, since the output terminal is separated from the integrated data acquisition unit and measurement analysis unit, space is reserved for subsequent data transmission between the measurement analysis unit and the output terminal through Bluetooth technology or remote interface.

Embodiment four

Different from the measurement and calculation devices for power saving before and after transformation of transformers provided by Embodiment 2 and Embodiment 3 of the utility model, in the measurement and calculation device for power saving before and after transformation of transformers provided by Embodiment 4 of the utility model, the measurement and analysis unit and the output terminal are integrated Type device, the data acquisition unit is separated from the integrated measurement analysis unit and output terminal. At this time, the data acquisition unit and the metering analysis unit in the original three separate devices are integrated together, reducing one device, and the installation is more convenient than the power saving measuring and calculating device before and after the transformation of the transformer provided by the second embodiment of the utility model.

Embodiment five

Improvements are made on the basis of the power saving measuring and calculating device before and after the transformation of the transformer provided by the third embodiment of the utility model. Bluetooth technology for data transmission. Therefore, the connection line between the measurement analysis unit and the output terminal is canceled, so that the connection line of the power saving measuring and calculating device before and after the transformation of the transformer provided by the fifth embodiment of the utility model is simpler and the installation is more convenient.

Its disadvantage is that, since Bluetooth technology is a short-distance wireless communication technology, when using the power saving measurement and calculation device before and after the transformation of the transformer provided by the fifth embodiment of the utility model, it is necessary for the staff to go to the site to read the measurement and calculation data of the power saving before and after the transformation of the transformer . Sometimes, due to the harsh natural environment where the transformer is located, it will pose a threat to the personal safety of the staff.

Embodiment six

Improvements are made on the basis of the power saving measurement and calculation device before and after transformer transformation provided by Embodiment 3 of the utility model. In the power saving measurement and calculation device before and after transformer transformation provided by Embodiment 6 of the utility model, the measurement analysis unit and the output terminal are respectively equipped There is a wired or wireless remote interface, and the measurement and analysis unit performs data transmission through the remote interface. At this time, the staff does not need to go to the site to read the power saving measurement data before and after the transformation of the transformer, but only needs to complete the task of reading the power saving measurement data before and after the transformation of the transformer in the control room.

also,

Specifically, wired communication is adopted between the first communication module and the second communication module; or, wireless communication is adopted between the first communication module and the second communication module.

More specifically, the communication protocol between the first communication module and the second communication module is the communication protocol of DL/645-2007 multifunctional electric energy meter. The communication protocol stipulates the physical connection, communication link and application technical specifications between the multi-function electric energy meter and the handheld unit or other data terminal equipment.

The specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the present utility model in detail. For the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims (10)

1. A measuring and calculating device for saving electric power before and after transformation of a transformer is characterized in that it comprises an electric energy metering analysis unit, a data acquisition unit, a first communication module and a second communication module, and the electric energy metering analysis unit includes a current transformer, a voltage mutual inductor devices and energy meters, The current transformer is used to measure the current flowing through the high and low voltage bus bars of the transformer, and send the measured current data to the electric energy meter; The voltage transformer is used to measure the voltage of the transformer high-voltage bus or low-voltage bus, and send the measured voltage data to the electric energy meter; The electric energy meter calculates the electric energy data according to the received current data and voltage data according to P=U×I×cosΦ; The first communication module is set on the side of the electric energy meter, the second communication module is set on the side of the data acquisition unit, and the electric energy meter is connected through the communication between the first communication module and the second communication module. communicating, sending the electric energy data to the data acquisition unit; in, P—electric power/W, U—voltage/V, I—current/A, Φ—phase angle between U and I. 2. The device for measuring and calculating power saving before and after transformation of a transformer according to claim 1, wherein a data display is provided on the data acquisition unit, and the data display is used to display the electric energy data in real time. 3. The measuring and calculating device for saving electric power before and after transformation of the transformer according to claim 1, further comprising a metering analysis unit and an output terminal, The metering and analysis unit calculates and obtains the power saving before and after the transformation of the transformer according to the electric energy data collected by the data acquisition unit; The output terminal is used to output the power saved before and after the transformation of the transformer. 4. The device for measuring and calculating power saving before and after transformation of a transformer according to claim 3, wherein the data acquisition unit, measurement analysis unit, and output terminal are all split devices. 5. The measuring and calculating device for saving electric power before and after transformation of the transformer according to claim 3, characterized in that, the data acquisition unit and the metering analysis unit are integrated devices, and the output terminal and the integrated data acquisition unit , Split between measurement and analysis units. 6. The device for measuring and calculating power saving before and after transformation of the transformer according to claim 3, characterized in that, the measurement and analysis unit and the output terminal are integrated devices, and the data acquisition unit and the integrated measurement and analysis unit , Split between output terminals. 7. The device for measuring and calculating power saving before and after transformation of a transformer according to claim 4 or 5, characterized in that, data transmission is performed between the metering analysis unit and the output terminal through Bluetooth technology. 8. The device for measuring and calculating power saving before and after transformation of a transformer according to claim 4 or 5, wherein the metering analysis unit and the output terminal are respectively provided with a wired or wireless remote interface, and the metering analysis unit passes The remote interface performs data transmission. 9. The power saving measuring and calculating device before and after transformation of the transformer according to claim 1 or 3, characterized in that, wired communication is adopted between the first communication module and the second communication module; or, the first communication module and the second communication module Wireless communication is adopted between the second communication modules. 10. According to claim 1 or 3, the power saving measuring and calculating device before and after the transformation of the transformer is characterized in that the communication protocol between the first communication module and the second communication module is selected from DL/645-2007 multifunctional electric energy meter letter of agreement.