WO2018019240A1 - Portable emergency power - Google Patents

Abstract

A portable emergency power, comprising an intermediate frequency generator (1), an uncontrolled 12-pulse rectifying part (2), a serial/parallel switching knife switch (3), an emergency power switch (4), a DC ice-melting switch (5), an inverter (6), a DC ice-melting wiring device (7), and an ice-melting 3-phase jumper (9); the intermediate frequency generator (1) is in output connection with the uncontrolled 12-pulse rectifying part (2), the uncontrolled 12-pulse rectifying part (2) is connected with the serial/parallel switching knife switch (3), and the serial/parallel switching knife switch (3) is connected with the inverter (6) by means of the emergency power switch (4) to achieve a power supply function; the uncontrolled 12-pulse rectifying part (2) is configured to rectify an outputted current of the intermediate frequency generator (1), and after rectification, the outputted current is referred to as a rectified current; the serial/parallel switching knife switch (3) is configured to adjust an outputted voltage and the rectified current of the intermediate frequency generator (1), so as to meet the ice-melting requirements of various circuits and the power requirements thereof during power supply. The portable emergency power possesses functions of both DC ice-melting and emergency power supply, which expands the range of use.

Description

Portable emergency power supply Technical field

The present disclosure pertains to the field of electrical engineering technology, for example, to a portable emergency power source.

Background technique

In 2008, large-scale rain and snow disasters in the south brought huge losses to the power grid. Due to the wide distribution of distribution network lines, most of them were in the micro-meteorological micro-meteorological area, and the accidents of inverted towers were frequent. Research and development of a simple and efficient distribution network ice-melting and power generation device is the key to improving the strength of the distribution network and ensuring reliable power supply. At present, some scientific research units have developed a portable ice melting device based on medium frequency voltage regulation and rectification, which has played a certain role in the rain and snow freezing disaster. However, since the device only has the function of DC melting ice, it only lasts in low temperature weather during the year. Used in a few days, even for several years in a row. A series of problems such as aging of the generator battery, failure to start the power supply and damage of the rectifier module in the idle state often lead to the inability of the ice melting device to be used, and the low utilization rate of the ice melting device seriously affects the promotion and use of the portable ice melting device, and the coverage is small. Moreover, the portable ice melting device itself is not efficient in melting ice, and can only melt one to two rods at a time, and can not effectively suppress the broken bar of the distribution line when a severe ice disaster occurs.

Summary of the invention

The present disclosure provides a portable emergency power supply, which can be used as an emergency power supply to protect power. When the distribution network is exposed to rain and snow, it is used for melting ice on the distribution line, improving the utilization rate and coverage of the device, and effectively supporting the distribution network. The line runs safely.

A portable emergency power supply, including an intermediate frequency generator, a 12-pulse rectification component, a series-parallel switching knife switch, an emergency power switch, a DC ice-melting switch, an inverter component, a DC ice-melting wiring device, and a melting ice three Short wiring;

Wherein, the intermediate frequency generator output is connected to the uncontrolled twelve-pulse rectifying component, and the uncontrolled twelve-pulse rectifying component is connected to the series-parallel switching knife gate, and the series-parallel switching knife gate passes the emergency power supply a switch is connected to the inverter component to implement a power supply function;

The uncontrolled twelve-pulse rectifying component is configured to rectify an output current of the intermediate frequency generator, and the rectified output current is referred to as a rectified current;

The series-parallel switching knife gate is configured to adjust an output voltage of the intermediate frequency generator and the rectified current to meet different melting demand of different lines and different power requirements during power supply;

The inverter component is configured to invert the output voltage to obtain a power frequency voltage;

The emergency power switch is configured to control disconnection and connection between the series-parallel switching knife gate and the inverter component;

The series-parallel switching knife gate is further connected to the DC ice-melting wiring device through the DC ice-melting switch, and the DC ice-melting wiring device is disposed to be connected to the first end of the ice-melting wire to be melted. The second end is short-circuited by the three-phase short-circuit of the melting ice to realize the DC melting function;

The DC ice melting switch is configured to control a connection and disconnection between the series-parallel switching knife gate and the DC ice-melting wiring device, and is interlocked with the emergency power switch;

The DC ice melting wiring device is arranged to realize DC melting ice of the distribution network line.

Optionally, the series-parallel switching knife gate comprises a first parallel knife gate, a second parallel knife gate and a serial knife gate, wherein the first parallel knife gate is connected in parallel with the second parallel knife gate, and the first end of the series knife gate is The first end of the first parallel switch is connected, and the second end of the series switch is connected to the first end of the second parallel switch.

Optionally, the DC ice melting wiring device comprises: a first positive joint, a second positive joint and a negative joint;

The wire to be melted includes a first wire to be melted and a wire to be melted;

The first end of the first positive joint is connected to the first end of the second positive joint, and is disposed to be connected to the positive pole of the DC ice melting switch, and the first end of the negative joint is set to be connected to the negative pole of the ice melting switch;

The second end of the first positive joint is suspended, the second end of the second positive joint is connected to the first ice-melting wire, and the second end of the negative joint is connected to the second ice-melting wire; Or the second end of the first positive connector is connected to the first ice-melting wire, the second end of the second positive connector is suspended, and the second end of the negative connector is connected to the second wire to be melted .

Optionally, the DC ice melting wiring device comprises: a first positive joint, a second positive joint and a negative joint;

The wire to be melted includes a first wire to be melted, a second wire to be melted, and a third wire to be melted;

The first end of the first positive joint is connected to the first end of the second positive joint, and is disposed to be connected to the positive pole of the DC ice melting switch, and the first end of the negative joint is set to be connected to the negative pole of the ice melting switch;

The second end of the second positive joint is connected to the first ice-melting wire, the second end of the negative joint is connected to the second ice-melting wire, and the second end of the first positive joint is The third wire to be melted is connected.

Optionally, the DC ice melting wiring device further comprises an ice melting cable and a melting ice clip;

At least one of the first positive joint, the second positive joint, and the negative joint is connected to the ice melting clamp by an ice melting cable, and the ice melting clamp is disposed to be in contact with the first end of the wire to be melted.

Optionally, the ice-melting short-circuit includes a short-connecting clip and a short-circuit cable, and is disposed at a second end of the wire to be melted, and is configured to realize a three-phase short-circuit grounding of the to-be-melted ice wire in the distribution network line, Perform DC melting ice.

The portable emergency power supply provided by the present disclosure has the functions of DC ice melting and emergency power supply, and greatly expands the scope of use, and is generally used for emergency power conservation, and is used for DC melting ice of distribution network lines during the glazing period; The potential of scale promotion will greatly enhance the ability of the agricultural distribution network line to resist large-scale rain and snow freezing disasters after large-scale use; it has multi-channel regulation function, wide range of power supply and melting ice, simple control system, good melting ice voltage DC performance After adopting intermediate frequency power generation, the power supply mode of rectification and inverter greatly reduces the size and weight of the generator. The two can be manually transported, and the emergency power supply and ice melting are highly mobile; Short-circuit with three-phase, convenient wiring, high efficiency of melting ice, and short-circuit grounding of three-phase at the end, effectively preventing the danger of reverse power transmission when the distribution line is melting ice.

BRIEF abstract

1 is a schematic structural view of a portable emergency power supply in the embodiment;

2 is a schematic structural view of a series-parallel switching knife switch in the embodiment;

FIG. 3 is a schematic structural view of the DC ice-melting wiring device 7 in the embodiment;

FIG. 4 is a schematic structural view showing the three-phase short wiring 9 of the ice melting in the present embodiment.

The figure is marked as:

1-intermediate frequency generator,

2-Do not control 12-pulse rectification components,

3-Series parallel switch switch,

4-emergency power switch,

5-DC ice-melting switch,

6-inverter parts,

7-DC ice melting wiring device,

8-to be melted ice wire,

9-melting ice three-phase short wiring,

31-series knife gate,

32-first parallel knife gate,

33-second parallel knife switch,

71-negative connector,

72-first positive joint,

73-second positive joint,

74-melting ice cable,

75-melting ice clip,

91-short clip,

92- Short cable.

detailed description

The portable emergency power supply has a wide range of applications, so that the portable power source has the ability to melt ice, which will greatly improve the configuration rate of the ice-melting components, and play an emergency power-saving function, effectively supporting the safety of the distribution network in the rain and snow disaster and reliable power supply. Sex.

1 is a schematic structural view of a portable emergency power supply in the present embodiment; FIG. 2 is a schematic structural view of a series-parallel switching knife gate in the present embodiment; FIG. 3 is a schematic view of the DC ice-melting wiring device 7 in the present embodiment. Schematic diagram of the structure; FIG. 4 is a schematic structural view of the three-phase short wiring 9 of the ice melting in the present embodiment.

Referring to FIG. 1 , a portable emergency power supply having a DC melting function, the device includes an intermediate frequency generator, an uncontrolled twelve-pulse rectifying component 2, a series-parallel switching knife gate 3, an emergency power switch 4, The DC ice-melting switch 5, the inverter component 6, the DC ice-melting wiring device 7, and the melting ice three-phase short wiring 9.

Wherein, the intermediate frequency generator 1 output is connected to the uncontrolled twelve-pulse rectifying unit 2, and the uncontrolled twelve-pulse rectifying unit 2 is connected to the series-parallel switching knife gate 3, and the series-parallel switching knife gate 3 Connecting the inverter component 6 through the emergency power switch 4 to implement a power supply function;

The uncontrolled twelve-pulse rectifying component 2 is arranged to rectify an output current of the intermediate frequency generator 1, and the rectified output current is referred to as a rectified current;

The series-parallel switching knife gate 3 is arranged to adjust an output voltage of the intermediate frequency generator 1 and the rectified current to meet different melting demand of different lines and different power requirements during power supply;

The inverter component 6 is configured to invert the output voltage corresponding to the rectified current to obtain a power frequency voltage:

The emergency power switch 4 is configured to control disconnection and connection between the series-parallel switching knife gate 3 and the inverter component 6;

The series-parallel switching knife gate 3 is further connected to the DC ice-melting wiring device through the DC ice-melting switch 5 7 , the DC ice-melting wiring device 7 is disposed to be connected to the first end of the ice-melting wire 8 , and the second end of the ice-melting wire 8 is short-circuited by the three-phase short wire 9 To achieve DC melting ice function;

The DC ice melting switch 7 is arranged to control the connection and disconnection between the series-parallel switching knife gate 3 and the DC ice-melting wiring device 7, and is interlocked with the emergency power switch 4;

The DC ice-melting wiring device 7 is arranged to realize DC-melting ice of the wire to be melted.

The intermediate frequency generator 1 of the present embodiment may be a commercially available TFDJ-12 light type generator with a size of 0.7 m×0.7 m×0.6 m, a weight of 80 kg, a power generation power of 12 kW, a power generation frequency of 400 Hz, and an output voltage range of 12 V to 24 V. Self-contained voltage and current display function; 12-pulse rectification unit 2 can be controlled by XDJS-20 type 12-pulse rectifier, rated current 500A, rated voltage 30V; series-parallel switching knife 3 can be CK-20 small Switching the knife gate; the emergency power switch 4 and the melting ice power switch 5 are connected by cables; the inverter component 6 can be a commercially available FLUKENB-9 type inverter, the inverter power is 9 kW, and the self-contained voltage display function can basically satisfy All small emergency power supply requirements; DC ice-melting wiring device 7 connector can be self-made joints, with a shunt for measuring the melting current, the flow capacity is 500A, the ice melting cable can be JV-120 cable, each The root length is 30m, the length of each line clamp is 3m, and each phase adopts two dockings to meet the requirements of all the ice-wire connection of the distribution line. The three-phase short-circuit of the ice-melting can be the same configuration as that of the ice-melting clamp. Belt connection Short cables ground nail. Wherein, the intermediate frequency generator is used for generating a special synchronous generator of three-phase intermediate frequency electric energy. Usually the frequency range of the intermediate frequency generator is above the power frequency, below 10,000 Hz.

During emergency power supply, the emergency power switch 4 and the ice melting power switch 5 are disconnected, and the operator may disconnect the emergency power switch 4 and the ice melting power switch 5, and adjust the voltage of the intermediate frequency generator 1 and the series-parallel switch. 3 The DC output is brought to the rated voltage of the inverter component 6, and the intermediate frequency generator 1 is turned off, the emergency power switch 4 is closed, and the ice melting power switch 5 continues to be in an open state, and the intermediate frequency generator 1 is turned on to realize the emergency power supply function. .

When the ice melts, the ice melting wiring is connected to the circuit shown in Figure 1 according to the melting ice scheme, and the three-phase short-circuit grounding, that is, the melting three-phase short wiring 9 first end access map In the circuit shown in Figure 1, the second end is grounded, and the position of the series-parallel knife gate 3 is adjusted, the voltage of the intermediate frequency generator 1 is adjusted to the lowest position, the ice-melting power switch 5 is closed, the emergency power switch 4 is disconnected, and the power is turned on. The frequency generator 1 adjusts the voltage to the corresponding melting current, and performs DC melting ice. After completion, the DC ice melting device 7 performs the phase inversion ice melting until the three-phase melting ice is completely finished. When melting ice, the voltage output is the lowest in series and parallel switch 3, that is, the series switch 31 is disconnected. When the first parallel switch 32 and the second parallel switch 33 are closed, the output voltage is the highest in series and parallel. When the gate 31 is closed and the first parallel switch 32 is disconnected from the second parallel switch 33, the output voltage is calculated as under:

I _DC = 1.25kU _AC

U _DC is the output voltage of DC melting ice; U _AC is the output voltage of the intermediate frequency generator 1 , and the output voltage of the intermediate frequency generator 1 can range from 12V to 24V. In the formula, k is the coefficient in series, and the DC melting ice is calculated. The output voltage range is 15V-60V. According to the line parameters of multiple agricultural distribution networks, the DC melting range can be calculated.

Minimum melting distance

Maximum melting distance

Where U _min is the minimum output DC voltage 15V, U _max is the maximum output DC voltage 60V, I _min and I _max are respectively the minimum melting current and the maximum melting current corresponding to a specific line type wire, and R _{0 is} the line type wire The resistance per unit length, the resistance coefficient of 2 and 1.5 when two phases are connected in series and in two strings. According to the formula and the wire parameters, the melting distance of the device can be calculated as shown in Table 1. Among them, referring to FIG. 3, the wire to be melted 8 is a three-phase wire, which is an upper phase conductor, a middle phase conductor and a lower phase conductor from top to bottom. The two-phase series connection means that the second positive electrode joint 73 in FIG. 3 is connected to the phase conductor, the negative electrode joint 71 is connected to the phase conductor, and the upper and lower two-phase conductors are connected in series, and the first positive joint 72 is suspended, that is, the middle phase conductor is temporarily melted. Optionally, the two-phase series connection may be that the first positive terminal 72 in FIG. 3 is connected to the phase conductor, the negative terminal 71 is connected to the phase conductor, the upper and lower two-phase wires are connected in series, and the second positive joint 73 is suspended, that is, temporarily not correct. The upper phase wire is melted by ice; the two strings are connected to the lower phase wire in FIG. 3, the negative electrode terminal 71 is connected to the phase wire, the first positive electrode connector 72 is connected to the middle phase wire, and the second positive electrode connector 73 is connected. The upper phase conductor, wherein 71 and the first positive terminal 72 are connected together, realizes the parallel connection of the upper phase conductor and the middle phase conductor, and is connected in series with the lower phase conductor, and only melts the ice for the lower phase conductor.

Table 1

Wire type Maximum melting distance (m) Minimum melting distance (m) LGJ×35 273 34 LGJ×50 311 38 LGJ×70 347 45 LGJ×95 384 50 LGJ×120 406 49 LGJ×150 430 48

Among them, the above-mentioned ice melting scheme may refer to a scheme formulated for a specific ice melting circuit before melting ice, including Wiring, melting ice voltage, and expected ice melting time

The working principle of the portable emergency power supply of the embodiment is: the medium frequency generator 1 of the device is used as the melting ice and the emergency power source, and the device uses the intermediate frequency power generation to greatly reduce the size of the generator and the power and voltage are guaranteed. The weight is sorted by the uncontrolled twelve-pulse rectifying unit 2 to output a high-quality DC voltage. The two outputs of the uncontrolled twelve-pulse rectifying unit 2 are merged by the series-parallel switching knife gate 3. When the series-connecting knife gate 31 is closed, the two outputs of the twelve-pulse rectifying unit 2 are not controlled in series, and the voltage is the highest. When the first parallel switch 32 and the second parallel switch 33 are closed, the two outputs of the twelve-wave rectifying unit 2 are not controlled in parallel, and the current is maximum. The output of the series-parallel switching knife gate 3 is connected to the inverter component 6 through the emergency power switch 4, and the DC voltage is inverted. By adjusting the output voltage of the intermediate frequency generator 1, a DC voltage of 220V or 50 Hz can be outputted for Emergency power supply in case of power failure or field construction. The output of the series-parallel switching knife gate 3 is connected to the DC ice-melting wiring device 7 through the DC ice-melting switch 5, and the first positive electrode connector 72 and the second positive electrode connector 73 are connected in the DC ice-melting wiring device 7, and the DC ice-melting switch is connected at the same time. The positive electrode of the fifth electrode and the negative electrode terminal 71 are connected to the negative electrode of the ice melting switch 5. Each of the first positive electrode connector 72, the second positive electrode connector 73 and the negative electrode connector 71 is connected to the ice melting wire clamp 75 through the ice melting cable 74. The corresponding wire clamp is connected to the ice-melting wire 8 to be melted, and the short-circuit clamp 91 and the short-circuit cable 92 are used to realize three-phase short-circuit grounding at the end of the wire to be melted, and DC ice melting is performed.

In this embodiment, the series-parallel switching knife gate 3 can realize high voltage and large current (that is, the maximum voltage can reach 60V when connected in series, and the maximum current can reach 400A in parallel, which is sufficient for melting the wire of the distribution network), and meet the requirements of different lines. When the ice melting demand and the power supply are different, the first parallel switch 32 is interlocked with the second parallel switch 33 (ie, the first parallel switch 32 and the second parallel switch 33 are simultaneously opened or closed), and simultaneously When the series switch 31 is blocked (ie, the first parallel switch 32 and the second parallel switch 33 are closed, the series switch 31 must be in an open state) to prevent a short circuit; the emergency power switch 4 and the DC ice-melting switch 5 are passed. The direct switching between the DC melting ice and the emergency power supply is realized, and the two switches are locked to each other; the DC melting device 7 can realize the simultaneous melting of the two-phase wire and the melting of the one-phase wire, and the second positive electrode connector 73 and the negative electrode connector 71 are used. The two-phase wires are connected to realize two-phase series melting ice, and the two-phase wires are simultaneously melted with ice, and the second positive electrode connector 73, the first positive electrode connector 72 and the negative electrode connector 71 are simultaneously connected with the three-phase wires to realize two-in-one series melting ice. Only serial connection Line melts ice.

Optionally, the embodiment adopts the intermediate frequency power generation technology as the power source, first rectifies, and then inverts the rectified DC voltage to obtain a power frequency voltage, and reduces the size and weight of the emergency power supply when the guaranteed power is constant. At the same time, the DC voltage is directly taken from the middle for melting ice, and the device is highly maneuverable.

Optionally, in the embodiment, when the ice is melted, the cable and the cable clamp are used to connect the wire to be melted and the three phases are realized. Short circuit, convenient wiring, high efficiency of melting ice, and short-circuit grounding at the end, effectively avoiding the danger of reverse power transmission when the ice of the agricultural distribution network line melts.

Optionally, the embodiment adopts a rectifier that does not control the twelve-pulse rectification component as the intermediate frequency generator, and the device control system is simple, the heat dissipation is convenient, the rectification effect is good, and the low-voltage system is convenient to use.

Industrial applicability

The portable emergency power supply provided by the embodiment has the functions of DC ice melting and emergency power supply, and greatly expands the scope of use, and is used for emergency power conservation during normal use, and is used for DC melting ice of distribution network lines during the glazing period; After the use of the area, it will greatly enhance the ability of the agricultural distribution network to withstand large-scale rain and snow freezing disasters; it has multi-channel regulation function, wide range of power supply and melting ice, simple control system, and good DC voltage performance. After adopting the intermediate frequency power generation, the rectification and inverter power supply mode greatly reduces the size and weight of the generator, and the emergency power supply and the ice melting are highly mobile. The wire clamp is used for ice-melting access and three-phase short-circuit, the wiring is convenient, the melting ice efficiency is high, and the end adopts three-phase short-circuit grounding, which effectively prevents the danger of reverse power transmission when the distribution network line melts ice.

Claims (6)

A portable emergency power supply, including an intermediate frequency generator, a 12-pulse rectification component, a series-parallel switching knife switch, an emergency power switch, a DC ice-melting switch, an inverter component, a DC ice-melting wiring device, and a melting ice three Short wiring; Wherein, the intermediate frequency generator output is connected to the uncontrolled twelve-pulse rectifying component, and the uncontrolled twelve-pulse rectifying component is connected to the series-parallel switching knife gate, and the series-parallel switching knife gate passes the emergency power supply a switch is connected to the inverter component to implement a power supply function; The uncontrolled twelve-pulse rectifying component is configured to rectify an output current of the intermediate frequency generator, and the rectified output current is referred to as a rectified current; The series-parallel switching knife gate is configured to adjust an output voltage of the intermediate frequency generator and the rectified current to meet different melting demand of different lines and different power requirements during power supply; The inverter component is configured to invert the output voltage to obtain a power frequency voltage; The emergency power switch is configured to control disconnection and connection between the series-parallel switching knife gate and the inverter component; The series-parallel switching knife gate is further connected to the DC ice-melting wiring device through the DC ice-melting switch, and the DC ice-melting wiring device is disposed to be connected to the first end of the ice-melting wire to be melted. The second end is short-circuited by the three-phase short-circuit of the melting ice to realize the DC melting function; The DC ice melting switch is configured to control a connection and disconnection between the series-parallel switching knife gate and the DC ice-melting wiring device, and is interlocked with the emergency power switch; The DC ice melting wiring device is arranged to realize DC melting ice of the wire to be melted. The portable emergency power supply according to claim 1, wherein the series-parallel switching knife gate comprises a first parallel knife gate, a second parallel knife gate and a series knife gate, wherein the first parallel knife gate is connected in parallel with the second parallel knife gate, A first end of the series switch is coupled to the first end of the first parallel switch, and a second end of the series switch is coupled to the first end of the second parallel switch. The portable emergency power supply according to claim 1 or 2, wherein the direct current ice melting wiring device comprises: a first positive joint, a second positive joint and a negative joint; The wire to be melted includes a first wire to be melted and a wire to be melted; The first end of the first positive joint is connected to the first end of the second positive joint, and is disposed to be connected to the positive pole of the DC ice melting switch, and the first end of the negative joint is set to be connected to the negative pole of the ice melting switch; The second end of the first positive joint is suspended, the second end of the second positive joint is connected to the first ice-melting wire, and the second end of the negative joint is connected to the second ice-melting wire; Or the second end of the first positive connector is connected to the first ice-melting wire, and the second end of the second positive connector is suspended. The second end of the negative electrode connector is connected to the second wire to be melted. The portable emergency power supply according to claim 1 or 2, wherein the direct current ice melting wiring device comprises: a first positive joint, a second positive joint and a negative joint; The wire to be melted includes a first wire to be melted, a second wire to be melted, and a third wire to be melted; The first end of the first positive joint is connected to the first end of the second positive joint, and is disposed to be connected to the positive pole of the DC ice melting switch, and the first end of the negative joint is set to be connected to the negative pole of the ice melting switch; The second end of the second positive joint is connected to the first ice-melting wire, the second end of the negative joint is connected to the second ice-melting wire, and the second end of the first positive joint is The third wire to be melted is connected. The portable emergency power supply according to claim 3 or 4, wherein the direct current ice melting wiring device further comprises an ice melting cable and a melting ice clamp; At least one of the first positive joint, the second positive joint, and the negative joint is connected to the ice melting clamp by an ice melting cable, and the ice melting clamp is disposed to be in contact with the first end of the wire to be melted. The portable emergency power supply according to claim 5, wherein said ice melting short wire comprises a short wire clip and a shorting cable disposed at a second end of the wire to be melted, and arranged to make ice to be melted in the distribution line The wire is grounded in three phases for DC melting.

Images