Metering device for power generation car during power supply of distribution network line

Abstract

The invention relates to the technical field of distribution network line metering, in particular to a metering device used when a power generation car supplies power to a distribution network line, which comprises an electric pole and a power transmission line erected at the upper part of the electric pole, and further comprises a metering box and a metering assembly arranged in the metering box, and the metering assembly comprises a mutual inductor, a wiring terminal, an electric energy meter and a control switch. The device is reasonable and compact in structure, can accurately meter the generating capacity when the electric energy meter is arranged and the generator car is connected to the distribution network line in the maintenance and transformation process of the distribution network line, thereby avoiding the influence on indexes such as line loss, and also can measure and calculate the oil consumption through the generating efficiency and generating capacity of the generator car. The problem that oil loss cannot be accurately calculated and controlled is avoided, the audit risk is reduced, the control switch is arranged, so that power supply protection equipment and personal safety are timely cut off under the condition that faults such as interphase short circuit and grounding occur in the line, and the arrangement of the control switch is also convenient for connection between the generator car and the distribution network line.

Description

Technical Field

[0001] The invention relates to the technical field of distribution network line metering, in particular to a metering device used for a power generation vehicle when supplying power via a distribution network line. Background Art

[0002] A power truck is a mobile power supply device that integrates power generation, energy storage and power conversion functions. During the inspection, transformation or emergency repair of distribution network lines, the power truck can serve as a temporary power source to avoid power outages for users; through grid-connected technology, it can achieve seamless switching with the main power grid, ensuring that users are not affected during the power supply switching process; in scenarios such as rural power grid transformation and urban line relocation, the power truck can provide large-capacity power support to meet the electricity needs of residents and enterprises. During major events such as the college entrance examination and cultural festivals, the power truck provides uninterrupted power support for important places; in the event of power outages caused by natural disasters, the power truck can serve as an emergency power source to quickly restore power supply and ensure power supply continuity.

[0003] However, the following defects exist in the current distribution network power supply by generator trucks: First, the generator truck is generally connected to the distribution network line manually through the grounding ring, which is time-consuming and difficult to operate, and can only be connected at the grounding ring. The generator truck is easily affected by the position of the grounding ring, resulting in an inability to approach the grounding ring, which has limitations; Second, the generator truck lacks supporting components when connected to the distribution network line, and there is a risk of falling, which is prone to accidents; Third, during the maintenance and transformation of 400V lines, the load of the maintenance line is connected through the generator truck, and the power generation cannot be accurately measured, resulting in line loss indicators not meeting the standards; Fourth, during the daily operation and maintenance of the generator truck, the fuel cannot be controlled by the power generation, which poses an audit risk. Summary of the Invention

[0004] The present invention provides a metering device for a power generation vehicle when supplying power through a distribution network line, which overcomes the deficiencies of the above-mentioned prior art and can effectively solve the problems of inaccurate metering and difficult connection of the existing power generation vehicle when supplying power through a distribution network line.

[0005] The technical solution of the present invention is achieved through the following measures: a metering device for a power generation vehicle when supplying power to a distribution network line, comprising a pole and a transmission line erected on the upper part of the pole, a metering box and a metering component arranged in the metering box, the metering component comprising a mutual inductor, a wiring terminal, an electric energy meter and a control switch, a conductive circuit provided in the metering box, the upper end of which passes through the metering box and is electrically connected to the transmission line, the lower end of the conductive circuit is electrically connected to the output end of the control switch, the output end of the control switch is electrically connected to the power supply end of the wiring terminal, a mutual inductor is provided on the conductive circuit, and the terminals of the mutual inductor and the test ends of the electric energy meter are electrically connected to the terminals corresponding to the wiring terminals respectively.

[0006] The following are further optimizations and / or improvements to the above technical solutions: The meter box may be provided with quick-connect sockets and collection modules at intervals. The outlet of the quick-connect socket is electrically connected to the inlet of the control switch, and the test end of the collection module is electrically connected to the output end of the electric energy meter.

[0007] A heat dissipation window communicating with the inside and outside may be provided on the lower side of the metering box, and an insect-proof net may be fixedly installed in the heat dissipation window.

[0008] As a preference, the meter box can be fixedly installed on the outside of the pole, and the installation height of the meter box is not less than 1.5 meters.

[0009] The above-mentioned conductive circuit may include a phase line L1, a phase line L2, a phase line L3 and a neutral line N. The transformer includes a current transformer CT1 arranged on the phase line L1, a current transformer CT2 arranged on the phase line L2 and a current transformer CT3 arranged on the phase line L3. The terminals of the current transformer CT1, the current transformer CT2 and the current transformer CT3 are respectively electrically connected to the terminals corresponding to the wiring terminals.

[0010] As another preferred embodiment, a plurality of movable wheels may be spaced apart on the lower side of the metering box.

[0011] The conductive circuit may include phase line A, phase line B and phase line C. The mutual inductor is a combined mutual inductor, and the terminals of the combined mutual inductor are electrically connected to the terminals corresponding to the wiring terminals and the incoming end of the control switch.

[0012] The present invention has a reasonable and compact structure. During the inspection and transformation of the distribution network line, by setting an electric energy meter, when the power generation vehicle is connected to the distribution network line, the power generation can be accurately measured, thereby avoiding the impact on indicators such as line loss. The fuel consumption can also be calculated according to the power generation efficiency and power generation of the power generation vehicle, avoiding the problem that the fuel loss cannot be accurately calculated and controlled, and reducing audit risks. By setting a control switch, in the event of a phase short circuit, grounding or other fault in the line, the power supply can be cut off in time to protect equipment and personal safety. The setting of the control switch also facilitates the connection between the power generation vehicle and the distribution network line, which can save installation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attachment Figure 1 It is a schematic diagram of the main structure of embodiments one to five of the present invention.

[0014] Attachment Figure 2 Schematic diagram of the main structure of embodiments six to seven of the present invention.

[0015] The codes in the attached figure are: 1 for the pole, 2 for the transmission line, 3 for the meter box, 4 for the terminal block, 5 for the energy meter, 6 for the control switch, 7 for the quick-connect socket, 8 for the acquisition module, 9 for the insect net, 10 for the moving wheel, and 11 for the combined mutual inductor. DETAILED DESCRIPTION

[0016] The present invention is not limited to the following embodiments, and specific implementation methods can be determined based on the technical solutions of the present invention and actual conditions.

[0017] In the present invention, for the convenience of description, the relative position relationship of each component is described based on the Figure 1 The positional relationships of front, back, top, bottom, left, and right are described in the layout of the manual. Figure 1 The layout direction is determined by the

[0018] The present invention will be further described below in conjunction with the embodiments and accompanying drawings: Example 1: As shown in the attached Figure 1 、 2 As shown, the metering device for the power generation vehicle when the power distribution network is powered includes a pole 1 and a transmission line 2 erected on the upper part of the pole 1, and also includes a metering box 3 and a metering component arranged in the metering box 3. The metering component includes a mutual inductor, a terminal 4, an electric energy meter 5 and a control switch 6. A conductive circuit is provided in the metering box 3, the upper end of which passes through the metering box 3 and is electrically connected to the transmission line 2. The lower end of the conductive circuit is electrically connected to the output end of the control switch 6, and the output end of the control switch 6 is electrically connected to the power supply end of the terminal 4. A mutual inductor is provided on the conductive circuit, and the terminal of the mutual inductor and the test end of the electric energy meter 5 are electrically connected to the terminal corresponding to the terminal.

[0019] According to the requirements, the control switch 6 is an existing well-known overcurrent and zero-sequence protection circuit breaker, such as the rdw5 series intelligent frame circuit breaker. The meter box 5 has a box door on the side, and a lock is provided between the box door and the meter box 5 to facilitate the safekeeping of the meter box 5. The terminal 4 is an existing well-known electric meter junction box. During the maintenance and transformation of the distribution network line, by setting the electric energy meter 5, when the power generation vehicle is connected to the distribution network line, the power generation can be accurately measured, thereby avoiding the impact on indicators such as line loss. The fuel consumption can also be calculated based on the power generation efficiency and power generation of the power generation vehicle, avoiding the problem of inability to accurately calculate and control fuel losses, reducing audit risks. By setting the control switch 6, in the event of a phase-to-phase short circuit, grounding or other faults in the line, the power supply can be promptly cut off to protect equipment and personal safety. The setting of the control switch 6 also facilitates the connection between the power generation vehicle and the distribution network line, which can save installation time.

[0020] The metering device for the power generation vehicle when supplying power on the distribution network can be further optimized and / or improved according to actual needs: Example 2: As an optimization of the above example, as shown in the attached Figure 1 、 2As shown, a quick-connect socket 7 and a collection module 8 are provided in the meter box 3. The outlet end of the quick-connect socket 7 is electrically connected to the input end of the control switch 6, and the test end of the collection module 8 is electrically connected to the output end of the electric energy meter 5.

[0021] According to the needs, the quick-connect socket 7 and the plug of the generator truck match each other, such as an aviation plug. In order to facilitate the connection between the conductive line and the transmission line 2, the conductive line is detachably connected in the meter box 3 through the existing well-known aviation plug. The acquisition module 8 is an existing well-known technology, such as the XSD68 smart electricity acquisition and control terminal. One end of the communication line is connected to the interface of the electricity meter 5, and the other end is connected to the interface of the acquisition module 8. There are four communication lines, two of which are data lines and two are power lines.

[0022] During use, by setting up a quick-connect socket 7, it can be matched with the plug of the power generation vehicle. The power generation vehicle is convenient to connect when supplying power to the transmission line 2, and convenient to disconnect when the power supply is finished. The installation is simple and safe, saving manpower and installation time. At the same time, the power generation vehicle is not affected by the position of the grounding ring during the connection process. The collection module 8 can create a file in the system, so that the power generation and power generation time can be collected every time the power generation vehicle is connected, which is convenient for subsequent data calculation and reduces management costs.

[0023] Example 3: As an optimization of the above embodiment, as shown in the attached Figure 1 、 2 As shown, a heat dissipation window communicating with the inside and outside is provided on the lower side of the metering box 3, and an insect-proof net 9 is fixedly installed in the heat dissipation window.

[0024] During use, by setting up an insect-proof net 9, the inside of the meter box 3 can be cooled, and insects can be prevented from entering the meter box 3 through the heat dissipation window to damage components. In order to improve the heat dissipation efficiency, an exhaust fan can be set in the heat dissipation window to discharge the heat in the meter box 3 through the heat dissipation window.

[0025] Example 4: As an optimization of the above example 3, as shown in the attached Figure 1 As shown, the meter box 3 is fixedly installed on the outside of the pole 1, and the installation height of the meter box 3 is not less than 1.5 meters.

[0026] According to the requirements, the lower part of the meter box 3 is fixed to the pole 1 through a clamp and a bracket fixed to the outer side of the lower part of the pole 1. The installation height of the meter box 3 is 1.5 meters. The meter box 3 is made of existing well-known plastic fiber material, which is dustproof and waterproof, and can ensure strength. At the same time, it can reduce weight and facilitate stable connection with the pole 1. During use, when the transmission line 2 erected on the upper part of the pole 1 is a 400V line, the meter box 3 is fixed to the outer side of the lower part of the pole 1. This is simple and safe to install, saving manpower and installation time, so that the power generation vehicle is not affected by the grounding position during the process of connecting to the transmission line 2, and the power generation vehicle can be quickly connected to the transmission line 2. When the power generation vehicle is connected to the distribution network line, it is stably connected to the meter box 3 to avoid accidents caused by falling.

[0027] Example 5: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, the conductive circuit includes a phase line L1, a phase line L2, a phase line L3 and a neutral line N, and the transformer includes a current transformer CT1 arranged on the phase line L1, a current transformer CT2 arranged on the phase line L2 and a current transformer CT3 arranged on the phase line L3, and the terminals of the current transformer CT1, the current transformer CT2 and the current transformer CT3 are respectively electrically connected to the terminals corresponding to the terminal 4.

[0028] According to the requirements, the transmission line 2 installed on the top of the pole 1 is a 400V line. The conductive line is a three-phase four-wire cable. The current transformer has a transformation ratio of 500 / 5. The current transformer can cooperate with the relay. When a short circuit or overload fault occurs in the line, it provides a signal to the relay to cut off the fault circuit to protect the safety of the power supply system.

[0029] Example 6: As another optimization of Example 2, as shown in the attached Figure 2 As shown, a plurality of moving wheels 10 are spaced apart on the lower side of the metering box 3 .

[0030] According to the needs, the meter box 3 is made of existing well-known stainless steel material, so that the strength of the meter box 3 can be guaranteed during the movement of the meter box 3. At the same time, the meter box 3 can also have the function of protecting against rain and snow, and can be used in conjunction with the power generation vehicle. In areas that the power generation vehicle cannot reach, the meter box 3 can be moved by the moving wheels 10, and the meter box 3 can be quickly connected to the power generation vehicle, so that the power generation vehicle can quickly access the transmission line 2. In order to facilitate the traction of the meter box 3, a traction hook is fixedly installed on the side of the meter box 3.

[0031] Example 7: As an optimization of the above embodiment, as shown in the attached Figure 2 As shown, the conductive circuit includes phase line A, phase line B and phase line C, the mutual inductor is a combined mutual inductor 11, and the terminals of the combined mutual inductor 1 are electrically connected to the terminals corresponding to the connection terminal 4 and the incoming end of the control switch 6.

[0032] According to the requirements, the transmission line 2 erected on the top of the pole 1 is a 10KV line, the conductive line is a three-phase cable, and the combined transformer 11 is a well-known technology, such as the JLSZ series power metering device, in which the voltage transformer is a 10kV / 100V voltage transformer and the current transformer is a 1500 / 5 (750 / 5) variable ratio current transformer. This can ensure safe power supply when the power generation vehicle is connected to the transmission line 2. The combined transformer 11 can be installed at the bottom of the meter box 3. The outlet end of the combined transformer 1 is connected to an existing well-known quick-connect plug. In this way, after the meter box 3 is removed, the quick-connect plug can be quickly electrically connected to the grounding ring of the transmission line, thereby realizing the connection between the power generation vehicle and the transmission line. The terminal block 4, the electric energy meter 5 and the acquisition module 8 are installed on the front inner side or the left inner side of the meter box 3 above the combined transformer 11, and the control switch 6 and the quick-connect socket 7 are installed on the rear inner side or the right inner side of the meter box 3 above the combined transformer 11.

[0033] The above technical features respectively constitute the embodiments of the present invention, which have strong adaptability and optimal implementation effects. Non-essential technical features can be added or removed according to actual needs to meet the requirements of different situations.

Claims

1. A metering device for a power generation vehicle when supplying power to a distribution network, comprising a power pole and a power transmission line erected on the top of the power pole, characterized in that It also includes a meter box and a metering component arranged in the meter box, the metering component includes a mutual inductor, a terminal block, an electric energy meter and a control switch, a conductive circuit is provided in the meter box, the upper end of which passes through the meter box and is electrically connected to the transmission line, the lower end of the conductive circuit is electrically connected to the output end of the control switch, the output end of the control switch is electrically connected to the power supply end of the terminal block, a mutual inductor is provided on the conductive circuit, and the terminals of the mutual inductor and the test ends of the electric energy meter are respectively electrically connected to the terminals corresponding to the terminal blocks.

2. The metering device for a power generation vehicle when supplying power to a distribution network according to claim 1 is characterized in that A quick-connect socket and a collection module are provided at intervals in the meter box. The outgoing end of the quick-connect socket is electrically connected to the incoming end of the control switch, and the test end of the collection module is electrically connected to the output end of the electric energy meter.

3. The metering device for a power generation vehicle when supplying power to a distribution network according to claim 1 or 2, characterized in that A heat dissipation window communicating with the inside and outside is provided on the lower side of the metering box, and an insect-proof net is fixedly installed inside the heat dissipation window.

4. The metering device for a power generation vehicle when supplying power to a distribution network according to claim 3 is characterized in that The meter box is fixedly installed on the outside of the pole, and the installation height of the meter box is not less than 1.5 meters.

5. The metering device for power generation vehicle when powering the distribution network according to claim 4 is characterized in that the conductive The circuit includes a phase line L1, a phase line L2, a phase line L3 and a neutral line N. The transformer includes a current transformer CT1 arranged on the phase line L1, a current transformer CT2 arranged on the phase line L2 and a current transformer CT3 arranged on the phase line L3. The terminals of the current transformer CT1, the current transformer CT2 and the current transformer CT3 are respectively electrically connected to the terminals corresponding to the wiring terminals.

6. The metering device for a power generation vehicle when supplying power to a distribution network according to claim 3 is characterized in that There are several moving wheels spaced apart on the lower side of the metering box.

7. The metering device for power generation vehicle when the power distribution network is powered according to claim 6, characterized in that the conductive The circuit includes a phase line A, a phase line B, and a phase line C. The mutual inductor is a combined mutual inductor. The terminals of the combined mutual inductor are electrically connected to the terminals corresponding to the wiring terminals and the incoming terminal of the control switch.

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