CN210775700U - Reactive compensation automatic switching detection device - Google Patents
Reactive compensation automatic switching detection device Download PDFInfo
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- CN210775700U CN210775700U CN201921499324.9U CN201921499324U CN210775700U CN 210775700 U CN210775700 U CN 210775700U CN 201921499324 U CN201921499324 U CN 201921499324U CN 210775700 U CN210775700 U CN 210775700U
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Abstract
The utility model discloses an automatic switching detection device of reactive compensation, the device include the cabinet body, cabinet door and operation panel, are provided with change over switch on the operation panel, and change over switch's below is provided with input circuit breaker and output circuit breaker, and the cabinet is internal to be provided with the contact voltage regulator and the hand wheel of contact voltage regulator exposes in the operation panel, and the cabinet is internal still to be equipped with resistance, alternating current transformer, alternating current contactor. The utility model discloses can utilize the dynamic switching of three phase current's phase angle, realize accurate, comprehensive simulation on-line state reactive compensation automatic switching function debugging.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a power equipment detects technical field, and is concrete, relates to an automatic switching detection device of reactive compensation.
[ background of the invention ]
With the rapid development of social economy, the terminal load diversity of the power system and the high-quality requirements of various industrial and mining enterprises and terminal users on the quality of electric energy are remarkable in contribution of reactive compensation to the aspects of power system stability, loss saving and the like, and the reactive compensation equipment detection device is vital to the function and the characteristic of the reactive compensation equipment and the consistency debugging of the reactive compensation equipment with national standard requirements.
According to the existing known information channel and related data, aiming at the detection device of the reactive compensation switch equipment, all matched equipment plants mostly adopt direct voltage and current and combine with a manual switching matched controller as the criterion for judging whether the quality of the reactive compensation switch equipment is qualified or not; an inductive load simulation online switching (such as a motor) is temporarily and directly installed on a load end by an individual equipment manufacturer with higher requirements.
However, these corresponding detection techniques are more or less insufficient, and on one hand, the real working conditions of online operation and automatic switching of reactive compensation equipment cannot be controlled by simply applying electric quantity and manually switching; on the other hand, an additional motor needs to be configured for simulating online switching every time, and the complexity of debugging programs is increased.
Moreover, due to the load diversity at the user terminal, the system needs to bear more reactive power in the whole chain link to meet the load requirement, so that the electric energy loss of the system is increased, and a plurality of key electrical devices cannot fully exert the maximum energy efficiency. The reactive compensation equipment judges the load property and carries out on-site compensation by sampling each analog quantity parameter of the power supply and distribution system, reduces the reactive demand of the load on the power generation and transmission system, reduces the loss and realizes the maximization of economic benefit. However, the reactive compensation equipment cannot realize online on-line dynamic switching function verification when being produced and manufactured by equipment manufacturers, and some simple detection means have serious defects and shortcomings in functional requirement verification.
[ Utility model ] content
The utility model aims at providing an utilize the dynamic switching of phase angle of three phase current, realize accurate, comprehensive reactive compensation automatic switching detection device of the online state reactive compensation automatic switching function debugging of simulation.
In order to achieve the main purpose, the utility model provides a reactive compensation automatic switching detection device, it includes the cabinet body, locates the cabinet door of cabinet body below and locates the operation panel of cabinet body top, be provided with change over switch on the operation panel, be provided with input circuit breaker and output circuit breaker below the change over switch, be provided with the contact voltage regulator in the cabinet door and the hand wheel of contact voltage regulator exposes in the operation panel; still be equipped with resistance, alternating current transformer, ac contactor in the cabinet body, resistance connection three-phase main loop current with between ac transformer's the primary, ac transformer's secondary with change over switch's signal input part electricity is connected, change over switch's two signal output parts are connected to ac contactor's main contact, ac contactor's main contact respectively with input circuit breaker's wiring end the input electricity of contact voltage regulator is connected, the output of contact voltage regulator with output circuit breaker's wiring end electricity is connected, wherein, three-phase four-wire power is inserted to input circuit breaker's input.
The switching-on and switching-off control system is characterized in that a switching-on indicating lamp, a switching-off indicating lamp, a switching-on button and a switching-off button are further arranged on the operating platform, the output end of the switching-off button on-off point is connected with the input end of a normally open contact of the alternating current contactor, the input end and the output end of the switching-on button on-off point are connected in parallel, the output end of the normally open contact of the alternating current contactor is electrically connected with the switching-on indicating lamp, and the output end of the normally closed contact of the alternating current contactor is electrically connected with the switching-off indicating lamp.
A further scheme is that an overvoltage relay is arranged on one side, close to the change-over switch, of the operating platform, and a coil end of the overvoltage relay is connected between a wiring end of the output circuit breaker and a wiring end of the input circuit breaker.
According to a further scheme, a time relay is further arranged on one side, close to the overvoltage relay, of the operating platform, and the time relay is electrically connected with a movable contact of the overvoltage relay.
A first voltmeter, a second voltmeter, a third voltmeter and an ammeter are arranged on the operating platform and close to the upper part of the change-over switch at intervals.
In a further scheme, a pause button and a zero clearing button are arranged on the other side, close to the change-over switch, of the operating platform.
In a further aspect, the ac transformer is a three-phase ac transformer.
In a further scheme, universal wheels are further arranged below the cabinet body.
Therefore, the utility model discloses a detection device mainly includes main component such as discretionary resistance, ac contactor, change over switch, input/output circuit breaker, contact voltage regulator, through change over switch's switching, gives the analog load nature of lead, lag, can detect reactive power compensator switching situation, and overvoltage relay is used for monitoring the power frequency overvoltage simultaneously, and when system operating voltage exceeded rated value (setting value), detection device should all amputate the capacitor bank in a certain time, adopts the excision of group by group usually; and simulating the actual grid-connected operation state, and realizing automatic switching of the reactive power compensation device and power frequency overvoltage protection by leading and lagging sampling signals and voltage monitoring.
In addition, according to the characteristic that the internal resistance of the compensation controller is small, a self-selection resistor is connected in series with the three-phase main current loop, and the requirement on the electrical service life can be met under the condition that the controller is correctly switched.
Therefore, the utility model discloses can simulate out through three-phase alternating current phase difference, feel, capacitive load signal provides the reactive compensation controller, realizes emulation detection debugging.
[ description of the drawings ]
Fig. 1 is a schematic structural diagram of an embodiment of the reactive compensation automatic switching detection device of the present invention.
Fig. 2 is a side view of an embodiment of the reactive compensation automatic switching detection device of the present invention.
Fig. 3 is a top view of an embodiment of the reactive compensation automatic switching detection device of the present invention.
Fig. 4 is a schematic diagram of an embodiment of the reactive compensation automatic switching detection device of the present invention.
Fig. 5 is a vector diagram of an embodiment of the reactive compensation automatic switching detection device of the present invention.
Fig. 6 is a schematic circuit diagram of an embodiment of the reactive compensation automatic switching detection device of the present invention.
Fig. 7 is a schematic diagram of a secondary control of an embodiment of the reactive compensation automatic switching detection device of the present invention.
Fig. 8 is a block diagram illustrating a flow of a detection method implemented in an embodiment of the reactive power compensation automatic switching detection device of the present invention.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention.
Referring to fig. 1 to 6, the utility model discloses a reactive compensation automatic switching detection device 1, it includes the cabinet body 10, locates cabinet door 20 of cabinet body 10 below and locates the operation panel 30 of cabinet body 10 top, is provided with change over switch SB5 on the operation panel 30, and the below of change over switch SB5 is provided with input circuit breaker QF1 and output circuit breaker, is provided with contact voltage regulator B1(40) in the cabinet door and the hand wheel 101 of contact voltage regulator B1 exposes in the operation panel 30; the cabinet body 10 Is further provided with a resistor R1, an alternating current transformer BK, an alternating current contactor KM (50), a resistor R1 Is connected between the primary end of the three-phase main loop current Is and the alternating current transformer BK, the secondary end of the alternating current transformer BK Is electrically connected with the signal input end of a switch SB5, two signal output ends of the switch SB5 are connected to main contacts of the alternating current contactor KM, main contacts of the alternating current contactor KM are respectively electrically connected with a terminal of an input breaker QF1 and an input end of a contact voltage regulator B1, and an output end of the contact voltage regulator B1 Is electrically connected with a terminal of an output breaker, wherein the input end of the input breaker QF1 Is connected to a three-phase four-wire power supply, the input breaker QF1 Is a three-phase breaker, and the output breaker Is three single-phase micro breakers, such as an output breaker QF 46.
In this embodiment, the operating board 30 is further provided with a closing indicator HR, a separating indicator HG, a closing button SB2, a separating button SB1, an output end of a closing point of the separating button SB1 is connected to an input end of a normally open contact of the ac contactor KM, an input end of an opening point of the closing button SB2 is connected in parallel with an input end of a normally open contact of the ac contactor KM, an output end of the normally open contact of the ac contactor KM is electrically connected to the closing indicator HR, and an output end of the normally closed contact of the ac contactor KM is electrically connected to the separating indicator HG.
In the present embodiment, an overvoltage relay YJ (60) is provided on the side of the console 30 close to the switch SB5, and a coil end of the overvoltage relay YJ is connected between the terminal of the output breaker and the terminal of the input breaker QF 1.
In this embodiment, a time relay KT is further disposed on one side of the console 30 close to the overvoltage relay YJ, and the time relay KT is electrically connected to a movable contact of the overvoltage relay YJ.
In the present embodiment, a first voltmeter V1, a second voltmeter V2, a third voltmeter V3, and an ammeter a1 are disposed on the console 30 at an interval above and close to the switch SB 5.
In the present embodiment, a pause button SB3 and a clear button SB4 are provided on the other side of the console 30 near the switch SB 5.
Preferably, the ac transformer BK is a three-phase ac transformer.
Preferably, universal wheels 102 are further disposed below the cabinet 10. Therefore, the bottom of the control platform of the whole detection device 1 is designed into a pulley, which is convenient for being suitable for equipment in different places.
The drop-in/drop-out criterion in this embodiment is: the characteristic that the load current lags the load voltage by one phase difference is inductive, the opposite is capacitive, and the current and the voltage are in the same phase, so that the load is resistive. It can be seen that, according to the load characteristic, the switching criterion of the reactive compensation controller is as follows: the current lags behind the voltage, and reactive power is put into operation, otherwise, the operation is quitted; the key point of the timing function (time relay KT) designed by the reactive compensation detection device 1 is to simulate inductive and capacitive load signals to be provided for a reactive compensation controller through the phase difference of a three-phase alternating current power supply so as to realize simulation detection debugging.
The advanced position is 0.5 advanced when the changeover switch SB5 is placed in the "101-L22 on state" position; the switch SB5 is in the "101-L32 ON state" position, which is a lagging position, and lags 0.5.
The reactive compensation detection device 1 of the embodiment has to meet the power frequency overvoltage protection test, when the working voltage of the system exceeds a rated value (set value), the detection device 1 should completely cut off the capacitor bank in 1min, and usually, the capacitor bank is cut off group by group; and simulating the actual grid-connected operation state, and realizing automatic switching of the reactive power compensation device and power frequency overvoltage protection by leading and lagging sampling signals and voltage monitoring.
Specifically, the leading/lagging sampling signal is implemented in the following manner: the switch SB5 is switched to '101-L22 on state', that is, B-phase electric quantity-I is obtainedBAnd compared with the a-phase voltage vector shown in fig. 4, the current leads the a-phase voltage (in-phase electric quantity sampling is performed when the actual compensation equipment runs in the grid-connected system), so that the load characteristic is judged to be inductive through simulation, and reactive compensation is performed. On the contrary, the switch SB5 is turned to "101-L32 on state", that is, the C-phase electric quantity-I is obtainedCCompared with the A-phase voltage vector shown in FIG. 4, the current lags the A-phase voltage (in-phase electric quantity sampling is performed when the actual compensation equipment runs in a grid-connected system), so that the load characteristic is judged to be capacitive through simulation, and reactive compensation is cut off.
Specifically, the specific implementation manner of the overvoltage protection action is as follows: the sampling voltage is increased to a fault voltage (abnormal voltage) through a contact voltage regulator B1, the fault voltage value is judged according to the indication of three voltmeters, when the voltage reaches a fault critical amplitude value, an overvoltage relay YJ acts (in action, reactive compensation switch equipment synchronously cuts off each capacitor branch circuit path by path), movable contacts 1 and 3 of the overvoltage relay YJ are switched on, then a time relay KT acts and starts to time (the cutting time limit meets the standard requirement of GB/T15576). The protection mainly simulates and judges the fault voltage of the distribution system of the matched switch equipment so as to timely quit reactive compensation when the amplitude of the system voltage exceeds a set value, thereby ensuring the service life of the key compensation equipment.
According to the content, the utility model discloses mainly to the online operation debugging detection of the reactive compensation automatic switching simulation of 0.4kV voltage class distribution system. Wherein, the utility model discloses to all three-phases of same rank voltage class mend altogether, the three-phase divides to mend and can both realize the online operation of simulation and detect, in the aspect of overvoltage protection is experimental and time-limited excision, this core function of electric quantity phase change automatic switching, can realize accurate, systematic full examination process, not only for guaranteeing that reactive compensation equipment can work under 0.4kV distribution network system operation safety index, greatly promoted reactive compensation equipment's productivity efficiency moreover.
Moreover, the utility model provides a detection device 1 compares traditional adoption direct voltage, electric current and combines manual switching supporting controller or directly installs a perception load simulation online switching (like the motor) detection mode additional temporarily at the load end and has more cheapness, high efficiency. The online dynamic simulation switching detection technology which cannot be solved by reactive compensation switch equipment is thoroughly solved and processed, the material supply period is shortened for the chain supply of the reactive compensation equipment and the matched equipment matched with a distribution network system, and online dynamic simulation pre-switching is performed in advance for the net hanging operation of the reactive function compensation switch equipment, so that the systematic and comprehensive detection of the functions of the commissioning equipment is ensured, and the hidden danger of the missing functions caused by conventional detection equipment is solved.
Therefore, the utility model discloses a detection device 1 mainly includes main components such as optional resistance R1, ac contactor KM, change over switch SB5, input/output circuit breaker, contact voltage regulator B1, through the switching of change over switch SB5, give leading, lagged analog load nature, can detect reactive power compensator switching situation, overvoltage relay YJ is used for monitoring the power frequency overvoltage simultaneously, when system operating voltage exceeded rated value (setting value), detection device 1 should all amputate the capacitor bank in a certain time, adopt to amputate gradually group by group usually; and simulating the actual grid-connected operation state, and realizing automatic switching of the reactive power compensation device and power frequency overvoltage protection by leading and lagging sampling signals and voltage monitoring.
In addition, according to the characteristic that the internal resistance of the compensation controller is small, the optional resistor R1 is connected in series with the three-phase main current loop, and the requirement on the electrical service life can be met under the condition that the controller is switched correctly. For example, if the secondary output voltage U2 of the ac voltage TC Is selected to be 12V and Is not greater than 5A, Is equal to U2/R1, it Is found that: r1 ═ U2/Is, R1>4.8 Ω. The resistance R1 of the present embodiment is preferably 5.6. omega./20 w.
Therefore, the utility model discloses can simulate out through three-phase alternating current phase difference, feel, capacitive load signal provides the reactive compensation controller, realizes emulation detection debugging.
As shown in fig. 7 and fig. 8, the present embodiment further provides a detection method for a reactive power compensation automatic switching detection device, where the method includes the following steps: a checking step S1, a wiring step S2, a loading step S3, and a cutting step S4.
In the checking step S1, it is determined whether the pointer of the contact regulator B1 is at the zero position, and if the determination result is no, the hand wheel 101 of the contact regulator B1 is rotated to adjust the pointer to the zero position.
In the connection step S2, the detection device 1 is electrically connected to the reactive compensation switchgear to be tested, and then the power supply is turned on.
In the input step S3, the change-over switch SB5 is set to the advanced position, the input breaker QF1 and the output breaker are closed, and the closing button SB2 is pressed to control the lighting of the closing indicator HR; and (3) rotating a hand wheel 101 of a contact voltage regulator B1 to a rated voltage of 380V, switching a selector switch SB5 to a lagging position after determining that a pointer corresponding to a reactive compensation controller of the reactive compensation switchgear to be tested marks an advanced position, delaying the reactive compensation controller for setting time to be put into operation, and completing the putting operation after all combination switches of the reactive compensation switchgear to be tested are switched on.
In the cutting step S4, the overvoltage value of the reactive power compensation controller is set to the rated voltage of the predetermined multiple, and the hand wheel 101 of the contact voltage regulator B1 is rotated to the predetermined multiple of the rated voltage; after determining that the reactive compensation controller sends out a cut-off signal, a compound switch of the reactive compensation switch equipment to be tested starts to be cut off, and a time relay KT starts to synchronously time; when the composite switch is completely cut off, a pause button SB3 is pressed, and the time of the cutting-off process of the composite switch in an overvoltage state is recorded; the reset button SB4 is pressed to restore the initial state of the time relay KT.
After the cutting step S4, an ending step S5 is executed, and when the online debugging of the detecting device 1 is completed, the opening button SB1 is pressed to control the detecting device 1 to exit the working state.
In practical applications, for example, when a produced reactive compensation switchgear is inspected, a detection procedure is now performed, and the specific principle and operation steps are as follows:
first, check whether the pointer of contact regulator B1 is at "zero position", if not, rotate the handwheel 101 of contact regulator B1 counterclockwise to adjust the pointer to "zero position".
And secondly, connecting voltage and current output sampling lines of the detection device 1, checking whether potential safety hazards exist in electrical connection of components in the reactive compensation switch equipment to be detected, and connecting a power plug after unsafe factors are eliminated if the potential safety hazards exist.
Thirdly, the change-over switch SB5 is arranged at an advanced position, the input breaker QF1, the output breaker QF2, the output breaker QF3 and the output breaker QF4 are closed, then the closing button SB2 is pressed, at the moment, the closing indicator light HR is on, the hand wheel 101 contacting with the voltage regulator B1 is rotated clockwise to the rated voltage of 380V (the consistency of the voltage meter and the voltage scale of the voltage regulator is checked), the corresponding pointer of the reactive compensation controller marks the advanced position, then the change-over switch SB5 is switched to a lagging position, the reactive compensation controller is put in a time delay setting mode, and after all the composite switches of the reactive compensation switch device are closed, the putting-in process is completed.
Setting the overvoltage value of the reactive compensation controller to be 1.1-1.2 times of the rated voltage, then rotating a hand wheel 101 of a contact voltage regulator B1 to be 1.1-1.2 times of the rated voltage, such as 420V, at the moment, the reactive compensation controller sends out a cutting signal, a corresponding combination switch starts to cut off, a time relay KT synchronously times, after the combination switch is completely cut off, a pause button SB3 is pressed, the time used in the cutting process during overvoltage is recorded, then a zero clearing button SB4 is pressed, and the starting state of the time relay KT is recovered.
And fifthly, after the simulation online debugging is finished, pressing a brake separating button SB1 to exit the working state.
Therefore, the utility model discloses a change over switch SB 5's switching, give the analog load nature of lead, lag, can detect reactive power compensator switching situation, overvoltage relay YJ is used for monitoring the power frequency overvoltage simultaneously, and when system operating voltage exceeded the rated value (setting value), detection device 1 should all amputate the capacitor bank in a certain time, generally adopted the excision of group by group; and simulating the actual grid-connected operation state, and realizing automatic switching of the reactive power compensation device and power frequency overvoltage protection by leading and lagging sampling signals and voltage monitoring.
In addition, according to the characteristic that the internal resistance of the compensation controller is small, the optional resistor R1 is connected in series with the three-phase main current loop, and the requirement on the electrical service life can be met under the condition that the controller is switched correctly.
Therefore, the utility model discloses can simulate out through three-phase alternating current phase difference, feel, capacitive load signal provides the reactive compensation controller, realizes emulation detection debugging.
It should be noted that the above is only the preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and all the insubstantial modifications made by using the design concept of the present invention also fall within the protection scope of the present invention.
Claims (8)
1. The utility model provides an automatic switching detection device of reactive compensation, includes the cabinet body, locates cabinet door and the locating of cabinet body below the cabinet body the operation panel of cabinet body top, its characterized in that:
a change-over switch is arranged on the operating platform, an input circuit breaker and an output circuit breaker are arranged below the change-over switch, a contact voltage regulator is arranged in the cabinet door, and a hand wheel of the contact voltage regulator is exposed out of the operating platform;
still be equipped with resistance, alternating current transformer, ac contactor in the cabinet body, resistance connection three-phase main loop current with between ac transformer's the primary, ac transformer's secondary with change over switch's signal input part electricity is connected, change over switch's two signal output parts are connected to ac contactor's main contact, ac contactor's main contact respectively with input circuit breaker's wiring end the input electricity of contact voltage regulator is connected, the output of contact voltage regulator with output circuit breaker's wiring end electricity is connected, wherein, three-phase four-wire power is inserted to input circuit breaker's input.
2. The reactive compensation automatic switching detection device according to claim 1, characterized in that:
the operating platform is further provided with a closing indicator lamp, a separating indicator lamp, a closing button and a separating button, the output end of the closing point of the separating button is connected with the input end of the normally open contact of the alternating current contactor, the input end and the output end of the opening point of the closing button are connected in parallel, the output end of the normally open contact of the alternating current contactor is electrically connected with the closing indicator lamp, and the output end of the normally closed contact of the alternating current contactor is electrically connected with the separating indicator lamp.
3. The reactive compensation automatic switching detection device according to claim 1, characterized in that:
an overvoltage relay is arranged on one side, close to the change-over switch, of the operating platform, and a coil end of the overvoltage relay is connected between a wiring end of the output circuit breaker and a wiring end of the input circuit breaker.
4. The reactive compensation automatic switching detection device according to claim 3, characterized in that:
and a time relay is also arranged on one side of the operating platform close to the overvoltage relay and is electrically connected with a movable contact of the overvoltage relay.
5. A reactive compensation automatic switching detection device according to any one of claims 1 to 4, characterized in that:
and a first voltmeter, a second voltmeter, a third voltmeter and an ammeter are arranged on the operating platform close to the upper part of the change-over switch at intervals.
6. A reactive compensation automatic switching detection device according to any one of claims 1 to 4, characterized in that:
and a pause button and a zero clearing button are arranged on the other side of the operating platform close to the change-over switch.
7. A reactive compensation automatic switching detection device according to any one of claims 1 to 4, characterized in that:
the alternating current transformer is a three-phase alternating current transformer.
8. A reactive compensation automatic switching detection device according to any one of claims 1 to 4, characterized in that:
the cabinet body below still is equipped with the universal wheel.
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| CN201921499324.9U CN210775700U (en) | 2019-09-10 | 2019-09-10 | Reactive compensation automatic switching detection device |
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| CN201921499324.9U CN210775700U (en) | 2019-09-10 | 2019-09-10 | Reactive compensation automatic switching detection device |
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| CN210775700U true CN210775700U (en) | 2020-06-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110412392A (en) * | 2019-09-10 | 2019-11-05 | 珠海市可利电气有限公司 | A kind of reactive compensation automatic switching detection device and its detection method |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110412392A (en) * | 2019-09-10 | 2019-11-05 | 珠海市可利电气有限公司 | A kind of reactive compensation automatic switching detection device and its detection method |
| CN110412392B (en) * | 2019-09-10 | 2024-04-02 | 珠海市可利电气有限公司 | Reactive compensation automatic switching detection device and detection method thereof |
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