CN203301163U - Composite switch of 10-kV no-impact switched multi-group capacitor group - Google Patents
Composite switch of 10-kV no-impact switched multi-group capacitor group Download PDFInfo
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Abstract
10kV无冲击投切多组电容器组的复合开关,涉及到10kV无功补偿领域,尤其是涉及到10kV复合开关分级多组投切电容器组;是为了解决现有10kV投切无功补偿电容器组的复合开关无法实现一个阀组多组投切和阀组不能单组工作的问题,它包括1个光电收发模块、控制器、高压可控硅阀组、高频脉冲电源、脉冲取能线圈、可控硅驱动盒、阀组故障和过零检测主板、三相真空断路器和N个单元;所述的单元包括2个光电收发模块、2个三相真空接触器、1个三相电抗器和1个三相电容器;通过高压可控硅阀组实现串有电抗器的三相电容器的过零投切,投切过程无冲击、无涌流,大大提高了三相电容器和机械开关的寿命,降低了投切三相电容器对10kV系统的影响,主要应用在10kV系统中。
The composite switch of 10kV non-impact switching multi-group capacitor banks involves the field of 10kV reactive power compensation, especially the classification of multi-group switching capacitor banks by 10kV composite switches; it is to solve the problem of existing 10kV switching reactive power compensation capacitor banks. The composite switch cannot realize the problem of multi-group switching of a valve group and the problem that the valve group cannot work in a single group. It includes a photoelectric transceiver module, a controller, a high-voltage thyristor valve group, a high-frequency pulse power supply, a pulse energy-taking coil, and a SCR drive box, valve group failure and zero-crossing detection main board, three-phase vacuum circuit breaker and N units; the unit includes 2 photoelectric transceiver modules, 2 three-phase vacuum contactors, 1 three-phase reactor and 1 three-phase capacitor; the zero-crossing switching of three-phase capacitors with reactors in series is realized through the high-voltage thyristor valve group. There is no impact and no inrush during the switching process, which greatly improves the life of three-phase capacitors and mechanical switches and reduces The impact of switching three-phase capacitors on the 10kV system is mainly used in the 10kV system.
Description
技术领域 technical field
本实用新型涉及到10kV无功补偿领域,尤其是涉及到10kV复合开关分级多组投切电容器组。 The utility model relates to the field of 10kV reactive power compensation, in particular to a 10kV composite switch graded multi-set switching capacitor bank. the
背景技术 Background technique
随着电力系统负荷的增加,对无功功率的需求也日益增加。显然这些大量的无功功率如果要发动机提供并长距离传输是不合理,通常也是不可能的。由于无功功率在电网中传输会造成网络损耗以及受电端电压下降,因此大量的无功功率在电网中传输必然使电能利用率大大降低且严重影响供电质量。在电网的适当位置装设无功补偿装置成为满足电网无功需求的必要手段。无功功率补偿对提高功率因数,保障电网有功功率的充分利用,减少线路损耗,提高电力系统的供电效率和电压质量,降低配电电路的成本具有重要意义。近年来,无功补偿对电力系统的重要性越来越被人们广泛认同。目前变电所内补偿电容器的投切均采用普通的开关,不能实现智能过零投切,因此电容器投切对系统、对电容器本体、对投切开关均产生较大的暂态冲击电压和电流,对电网设备、补偿电容器、投切开关的安全运行造成极大的危害。理论研究、实际测试和运行经验表明,频繁的电容器非过零投切会导致开关寿命的降低、电容器的过流爆炸、对电网一些敏感用电设备的干扰。 With the increase of power system load, the demand for reactive power is also increasing. Obviously, it is unreasonable and usually impossible for these large amounts of reactive power to be provided by the engine and transmitted over a long distance. Since the transmission of reactive power in the grid will cause network loss and voltage drop at the receiving end, the transmission of a large amount of reactive power in the grid will inevitably reduce the utilization rate of electric energy and seriously affect the quality of power supply. Installing reactive power compensation devices at appropriate locations in the power grid has become a necessary means to meet the reactive power requirements of the power grid. Reactive power compensation is of great significance to improve the power factor, ensure the full utilization of the active power of the grid, reduce line loss, improve the power supply efficiency and voltage quality of the power system, and reduce the cost of power distribution circuits. In recent years, the importance of reactive power compensation to power systems has been widely recognized by people. At present, the switching of compensation capacitors in substations adopts ordinary switches, which cannot realize intelligent zero-crossing switching. Therefore, switching capacitors generates large transient impulse voltage and current to the system, to the capacitor body, and to the switching switch. It will cause great harm to the safe operation of power grid equipment, compensation capacitors and switching switches. Theoretical research, actual test and operation experience show that frequent non-zero switching of capacitors will lead to the reduction of switch life, overcurrent explosion of capacitors, and interference to some sensitive electrical equipment in the power grid. the
随着系统中变频器、整流设备、电弧炉等非线性负荷的增多,电力系统的谐波污染也越来越严重,单独由电容器实现的无功补偿设备在系统中运行变得越来越危险,谐波会造成补偿电容器组的谐振过电压或过电流,造成电容器的烧毁或者系统其它用电设备的过电压故障,目前解决这种问题的唯一方案就是在电容器支路串联大容量的抑制谐波电抗器,而抑制谐波电抗器的串入大大降低了高压投切开关的寿命,在切除补偿支路时会造成拉弧烧毁,所以高压可控硅阀组投切串有抑制谐波电抗器的电容器组成为目前最可靠的投切开关,但高压可控硅阀组目前的价格比较昂贵,分多组投切时造价很高,所以高压复合开关成为最优的选择。 With the increase of nonlinear loads such as frequency converters, rectifiers, and electric arc furnaces in the system, the harmonic pollution of the power system is becoming more and more serious, and the operation of reactive power compensation equipment realized by capacitors alone in the system becomes more and more dangerous. , the harmonics will cause the resonant overvoltage or overcurrent of the compensation capacitor bank, resulting in the burning of the capacitor or the overvoltage fault of other electrical equipment in the system. Wave reactor, and the series connection of the suppression harmonic reactor greatly reduces the life of the high-voltage switching switch. When the compensation branch is cut off, it will cause arc burnout, so the high-voltage thyristor valve group switching series has a suppression harmonic reactor The capacitor composition is the most reliable switching switch at present, but the current price of the high-voltage thyristor valve group is relatively expensive, and the cost of switching in multiple groups is very high, so the high-voltage composite switch has become the best choice. the
在低压系统中,复合开关已经有大量的使用,复合开关的构造是在接触器的两端并联一个小容量的双向可控硅,复合开关的动作过程是: In the low-voltage system, the composite switch has been widely used. The structure of the composite switch is to connect a small-capacity bidirectional thyristor in parallel at both ends of the contactor. The action process of the composite switch is:
投入时,双向可控硅先过零导通,然后接触器吸合,无冲击的完成投入过程; When inputting, the bidirectional thyristor first conducts at zero crossing, and then the contactor pulls in, and completes the input process without impact;
切除时,给双向可控硅的驱动盒驱动信号,让双向可控硅导通,然后再给接触器断开信号,接触器断开后,切除可控硅的驱动信号,无拉弧的完成切除过程。 When cutting off, give the drive box of the bidirectional thyristor a driving signal to make the bidirectional thyristor conduct, and then give the contactor a disconnection signal. After the contactor is disconnected, cut off the driving signal of the thyristor, and there is no completion of arc pulling Excision process. the
实用新型内容 Utility model content
本实用新型是为了解决现有10kV投切无功补偿电容器组的复合开关无法实现一个阀组多组投切和阀组不能单组工作的问题,从而提出了一种10kV无冲击投切多组电容器组的复合开关。 The utility model is to solve the problem that the compound switch of the existing 10kV switching reactive power compensation capacitor group cannot realize the multi-group switching of a valve group and the valve group cannot work in a single group, thus proposing a 10kV non-impact switching multi-group Composite switch for capacitor banks. the
10kV无冲击投切多组电容器组的复合开关,它包括第一光电收发模块、控制器、高压可控硅阀组、高频脉冲电源、脉冲取能线圈、可控硅驱动盒、阀组故障和过零检测主板、三相真空断路器和N个单元; 10kV non-impact switching composite switch for multi-capacitor banks, which includes the first photoelectric transceiver module, controller, high-voltage thyristor valve group, high-frequency pulse power supply, pulse energy-taking coil, thyristor drive box, valve group failure and zero-crossing detection main board, three-phase vacuum circuit breaker and N units;
所述的每个单元包括第二光电收发模块、第三光电收发模块、2个三相真空接触器、1个三相电抗器和1个三相电容器; Each unit includes a second photoelectric transceiver module, a third photoelectric transceiver module, two three-phase vacuum contactors, one three-phase reactor and one three-phase capacitor;
所述的控制器的第一控制信号输出端与第一光电收发模块的控制信号输入端连接,该控制器的第一状态信号输入端与第一光电收发模块的状态信号输出端连接,所述的第一光电收发模块的控制信号输出端与三相真空断路器的控制端连接; The first control signal output end of the controller is connected to the control signal input end of the first photoelectric transceiver module, the first state signal input end of the controller is connected to the state signal output end of the first photoelectric transceiver module, and the The control signal output terminal of the first photoelectric transceiver module is connected to the control terminal of the three-phase vacuum circuit breaker;
所述控制器的第二控制信号输出端与第二光电收发模块的控制信号输入端连接,该控制器的第二状态信号输入端与第二光电收发模块的状态信号输出端连接, The second control signal output end of the controller is connected with the control signal input end of the second photoelectric transceiver module, the second state signal input end of the controller is connected with the state signal output end of the second photoelectric transceiver module,
所述的第二光电收发模块的控制信号输出端与第一三相真空接触器的控制端连接; The control signal output end of the second photoelectric transceiver module is connected to the control end of the first three-phase vacuum contactor;
所述的控制器的第三控制信号输出端与第三光电收发模块的控制信号输入端连接,该控制器的第三状态信号输入端与第三光电收发模块的状态信号输出端连接,所述的第三光电收发模块的控制信号输出端与第二三相真空接触器的控制端连接; The third control signal output end of the controller is connected to the control signal input end of the third photoelectric transceiver module, the third state signal input end of the controller is connected to the state signal output end of the third photoelectric transceiver module, and the The control signal output terminal of the third photoelectric transceiver module is connected to the control terminal of the second three-phase vacuum contactor;
所述的控制器的触发信号输出端与高频脉冲电源的触发信号输入端连接,该控制器的故障信号输入端与高频脉冲电源的故障信号输出端连接,所述的高频脉冲电源的电能信号输出端与阀组故障和过零检测主板的电能信号输入端连接,所述的阀组故障和过零检测主板的故障信号输出端与控制器的阀组故障信号输入端连接,所述的阀组故障和过零检测主板的过零信号输出端与控制器的过零信号输入端连接,所述的高压可控硅阀组的控制信号输出端与阀组故障和过零检测主板的控制信号输入端连接,所述的高频脉冲电源通过高压硅胶线穿过脉冲取能线圈,所述的脉冲取能线圈的一端与可控硅驱动盒的信号输入端连接,所述的可控硅驱动盒的驱动信号输出端与高压可控硅阀组的驱动信号输入端连接, The trigger signal output end of the controller is connected to the trigger signal input end of the high-frequency pulse power supply, the fault signal input end of the controller is connected to the fault signal output end of the high-frequency pulse power supply, and the high-frequency pulse power supply The power signal output end is connected to the power signal input end of the valve group failure and zero-crossing detection main board, and the failure signal output end of the valve group failure and zero-crossing detection main board is connected to the valve group failure signal input end of the controller. The zero-crossing signal output end of the valve group fault and zero-crossing detection main board is connected with the zero-crossing signal input end of the controller, and the control signal output end of the high-voltage thyristor valve group is connected with the valve group fault and zero-crossing detection main board The control signal input terminal is connected, the high-frequency pulse power supply passes through the pulse energy-taking coil through a high-voltage silicone wire, one end of the pulse energy-taking coil is connected to the signal input terminal of the thyristor drive box, and the controllable The drive signal output terminal of the silicon drive box is connected to the drive signal input terminal of the high-voltage thyristor valve group,
所述的高压可控硅阀组的三相输入端同时与三相真空断路器的一端和第一三相真空接触器的一端连接,所述的三相真空断路器的控制端与第一光电收发模块的控制信号输出端连接, The three-phase input end of the high-voltage thyristor valve group is connected to one end of the three-phase vacuum circuit breaker and one end of the first three-phase vacuum contactor at the same time, and the control end of the three-phase vacuum circuit breaker is connected to the first photoelectric The control signal output terminal of the transceiver module is connected,
所述的高压可控硅阀组的三相输出端与第二三相真空接触器的一端连接,所述的第一 三相真空接触器的另一端同时与第二三相真空接触器的另一端连接和三相电抗器的一端连接,所述的三相电抗器的另一端与三相电容器连接。 The three-phase output end of the high-voltage thyristor valve group is connected to one end of the second three-phase vacuum contactor, and the other end of the first three-phase vacuum contactor is simultaneously connected to the other end of the second three-phase vacuum contactor. One end is connected to one end of a three-phase reactor, and the other end of the three-phase reactor is connected to a three-phase capacitor. the
所述的N为大于或等于2的正整数。 Said N is a positive integer greater than or equal to 2. the
所述的高压可控硅阀组为两相高压可控硅阀组,所述的两相高压可控硅阀组包括A相和C相。 The high-pressure thyristor valve group is a two-phase high-pressure thyristor valve group, and the two-phase high-pressure thyristor valve group includes phase A and phase C. the
通过控制器内部参数的设定,本实用新型所述的10kV无冲击投切多组电容器组的复合开关可以工作在“复合开关状态”、“机械开关状态”、“综合开关状态”三种工作模式。 Through the setting of the internal parameters of the controller, the composite switch of the 10kV non-impact switching multi-group capacitor bank described in the utility model can work in three kinds of operations: "composite switch state", "mechanical switch state" and "comprehensive switch state". model. the
(一)复合开关状态 (1) Composite switch state
当一切都正常时,系统无功波动不是很快速的时候,一般工作在这种状态。 When everything is normal and the reactive power fluctuation of the system is not very fast, it generally works in this state. the
以一组三相电容器为例,介绍三相电容器投入和切除过程: Taking a group of three-phase capacitors as an example, the process of switching on and removing the three-phase capacitors is introduced:
三相电容器投入过程:控制器先发控制投信号给三相真空断路器,待三相真空断路器闭合后,控制器判断三相真空断路器的合闸信号,如果控制器没有接收到第一光电收发模块的合闸信号,则控制器发送三相真空断路器拒动故障信号;如果控制器接收到第一光电收发模块的合闸信号,则控制器给第二三相真空接触器合闸信号,如果控制器没有接收到第二三相真空接触器的合闸信号,则控制器发第二三相真空接触器拒动故障信号;如果控制器接收到第二三相真空接触器的合闸信号,则控制器检测阀组故障和过零检测主板发出的高压可控硅阀组的过零信号和阀组故障信号,如果没有检测到过零信号,控制器报同步信号故障;如果检测到阀组故障信号,控制器报阀组故障;如果控制器检测到阀组故障和过零检测主板的过零信号,控制器给高频脉冲电源触发信号,并检测高频脉冲电源是否有故障信号,如果高频脉冲电源有故障信号,则控制器报高频脉冲电源故障信号,如果高频脉冲电源没有故障信号,高频脉冲电源通过高压硅胶线给脉冲取能线圈供能,脉冲取能线圈通过可控硅触发盒驱动高压可控硅阀组导通;三相电容器投入到10kV系统中,控制器给第一三相真空接触器合闸信号,如果控制器没有接收到第二光电收发模块发出的合闸信号,则控制器发第一三相真空接触器拒动故障信号,如果控制器接收到第二光电收发模块发出的合闸信号,则控制器停止给高频脉冲电源触发信号,高压可控硅阀组截止导通,控制器给第二三相真空接触器分闸信号,如果控制器没有接收到第三光电收发模块发出的分闸信号,则控制器发第二三相真空接触器拒动故障信号,这就完成了一组三相电容器的投入过程。 Three-phase capacitor input process: the controller first sends a control signal to the three-phase vacuum circuit breaker. After the three-phase vacuum circuit breaker is closed, the controller judges the closing signal of the three-phase vacuum circuit breaker. If the controller does not receive the first If the closing signal of the photoelectric transceiver module is received, the controller will send the three-phase vacuum circuit breaker refusal fault signal; if the controller receives the closing signal of the first photoelectric transceiver module, the controller will close the second three-phase vacuum contactor signal, if the controller does not receive the closing signal of the second three-phase vacuum contactor, the controller sends the second three-phase vacuum contactor rejection fault signal; if the controller receives the closing signal of the second three-phase vacuum contactor Gate signal, the controller detects valve group failure and zero-crossing detection The zero-crossing signal and valve group failure signal of the high-voltage thyristor valve group sent by the main board, if no zero-crossing signal is detected, the controller reports a synchronization signal failure; if detected When the fault signal of the valve group is detected, the controller reports the fault of the valve group; if the controller detects the fault of the valve group and the zero-crossing signal of the zero-crossing detection main board, the controller sends a trigger signal to the high-frequency pulse power supply and detects whether the high-frequency pulse power supply is faulty signal, if the high-frequency pulse power supply has a fault signal, the controller will report the high-frequency pulse power supply fault signal, if the high-frequency pulse power supply has no fault signal, the high-frequency pulse power supply will supply energy to the pulse energy coil through the high-voltage silicone wire, and the pulse energy The coil drives the high-voltage thyristor valve group to conduct through the thyristor trigger box; the three-phase capacitor is put into the 10kV system, and the controller sends the closing signal to the first three-phase vacuum contactor. If the controller does not receive the second photoelectric transceiver If the closing signal sent by the module, the controller sends the first three-phase vacuum contactor failure signal, if the controller receives the closing signal sent by the second photoelectric transceiver module, the controller stops sending the high-frequency pulse power supply trigger signal , the high-voltage thyristor valve group is turned off and turned on, and the controller sends an opening signal to the second three-phase vacuum contactor. If the controller does not receive the opening signal from the third photoelectric transceiver module, the controller sends the second three-phase The vacuum contactor rejects the fault signal, which completes the input process of a group of three-phase capacitors. the
三相电容器切除过程:控制器通过第二光电收发模块检测第一三相真空接触器的分合闸状态信号, Three-phase capacitor removal process: the controller detects the opening and closing state signal of the first three-phase vacuum contactor through the second photoelectric transceiver module,
当控制器检测到第一三相真空接触器处于合闸状态时,控制器给第二三相真空接触器合闸信号, When the controller detects that the first three-phase vacuum contactor is in the closing state, the controller sends a closing signal to the second three-phase vacuum contactor,
控制器检测阀组故障和过零检测主板发出的过零信号和阀组故障信号,当控制器没有检测到阀组故障和过零检测主板的过零信号,则控制器报同步信号故障;当控制器检测到阀组故障和过零检测主板的阀组故障信号,则控制器报阀组故障; The controller detects the valve group failure and the zero-crossing signal and the valve group failure signal sent by the zero-crossing detection main board. When the controller detects the valve group failure and the valve group failure signal of the zero-crossing detection board, the controller reports the valve group failure;
当控制器检测到阀组故障和过零检测主板的过零信号后,控制器给高频脉冲电源触发信号,并检测高频脉冲电源是否有故障信号,假如控制器检测到高频脉冲电源有故障信号,则控制器报电源故障信号。如果控制器检测到高频脉冲电源没有故障信号,则高频脉冲电源通过高压硅胶线给脉冲取能线圈供能,脉冲取能线圈通过可控硅触发盒驱动高压可控硅阀组导通;控制器给第一三相真空接触器分闸信号,如果控制器没有接收到第二光电收发模块发出的已分闸信号,则控制器发第一三相真空接触器拒动故障信号,如果控制器接收到第二光电收发模块发出的分闸信号,则控制器停止给高频脉冲电源触发信号,高压可控硅阀组截止导通,控制器给第二三相真空接触器分闸信号,如果控制器没有接收到第三光电收发模块发出的分闸信号,则控制器发第二三相真空接触器拒动故障信号,综上就完成了一组三相电容器的切除过程。 When the controller detects the failure of the valve group and the zero-crossing signal of the zero-crossing detection main board, the controller sends a trigger signal to the high-frequency pulse power supply and detects whether the high-frequency pulse power supply has a fault signal. If the controller detects that the high-frequency pulse power supply has If there is a fault signal, the controller will report a power failure signal. If the controller detects that the high-frequency pulse power supply has no fault signal, the high-frequency pulse power supply supplies energy to the pulse energy-taking coil through the high-voltage silicone wire, and the pulse energy-taking coil drives the high-voltage thyristor valve group to conduct through the thyristor trigger box; The controller sends an opening signal to the first three-phase vacuum contactor. If the controller does not receive the opening signal from the second photoelectric transceiver module, the controller sends the first three-phase vacuum contactor a failure signal. When the device receives the opening signal from the second photoelectric transceiver module, the controller stops sending the high-frequency pulse power supply trigger signal, the high-voltage thyristor valve group is turned off, and the controller gives the second three-phase vacuum contactor an opening signal. If the controller does not receive the opening signal sent by the third photoelectric transceiver module, the controller sends the second three-phase vacuum contactor rejection fault signal. In summary, the removal process of a group of three-phase capacitors is completed. the
(二)机械开关状态 (2) Mechanical switch status
以一组三相电容器为例,介绍三相电容器投入和切除过程: Taking a group of three-phase capacitors as an example, the process of switching on and removing the three-phase capacitors is introduced:
当控制器检测到阀组故障信号、同步故障或电源故障时,控制器控制三相真空断路器闭合,待三相真空断路器闭合后,控制器判断三相真空断路器的合闸信号,如果控制器没有接收到第一光电收发模块发出的合闸信号,则控制器发三相真空断路器拒动故障信号; When the controller detects a valve group failure signal, synchronization failure or power failure, the controller controls the three-phase vacuum circuit breaker to close. After the three-phase vacuum circuit breaker is closed, the controller judges the closing signal of the three-phase vacuum circuit breaker. If If the controller does not receive the closing signal from the first photoelectric transceiver module, the controller sends a three-phase vacuum circuit breaker refusal fault signal;
如果控制器接收到第一光电收发模块发出的合闸信号, If the controller receives the closing signal sent by the first photoelectric transceiver module,
投入时,控制器给第一三相真空接触器合闸信号,如果控制器没有接收到第二光电收发模块发出的合闸信号,则控制器发第二三相真空接触器拒动故障信号,如果控制器接收到第二光电收发模块发出的合闸信号,则投入过程完毕; When put into operation, the controller sends the closing signal to the first three-phase vacuum contactor. If the controller does not receive the closing signal from the second photoelectric transceiver module, the controller sends the second three-phase vacuum contactor a refusal fault signal. If the controller receives the closing signal sent by the second photoelectric transceiver module, the input process is completed;
切除时,控制器给第一三相真空接触器分闸信号,如果控制器没有接收第二光电收发模块发出的分闸信号,则控制器发第二三相真空接触器拒动故障信号,如果控制器接收到第二光电收发模块发出的分闸信号,则切除过程完毕。 When cutting off, the controller sends an opening signal to the first three-phase vacuum contactor. If the controller does not receive the opening signal from the second photoelectric transceiver module, the controller sends a failure signal to the second three-phase vacuum contactor. If When the controller receives the opening signal sent by the second photoelectric transceiver module, the cutting process is completed. the
机械开关状态,只适用于系统应急。 Mechanical switch state, only applicable to system emergency. the
(三)综合开关状态 (3) Comprehensive switch status
当系统有较快波动的无功负荷,其余一切正常时,本实用新型所述的10kV无冲击投 切多组电容器组的复合开关一般工作在综合开关状态。 When the system has reactive power loads fluctuating faster, and all the others are normal, the composite switch of the 10kV non-impact switching multi-group capacitor bank described in the utility model generally works in the comprehensive switch state. the
综合开关状态的投切过程,与复合开关状态的投切过程一致,就是针对快速波动的无功负荷,控制器检测基础无功,将基础无功以复合开关工作状态模式投入到10kV系统中,留一组三相电容器工作在可控硅投切的状态,快速跟踪波动的无功负荷,保证10kV系统不过补,功率因数高; The switching process of the comprehensive switch state is consistent with the switching process of the composite switch state, that is, for the rapidly fluctuating reactive load, the controller detects the basic reactive power, and puts the basic reactive power into the 10kV system in the composite switch working state mode. Leave a group of three-phase capacitors to work in the state of thyristor switching, quickly track the fluctuating reactive load, and ensure that the 10kV system does not compensate and the power factor is high;
可控硅投切的状态以一组三相电容器为例, Take a group of three-phase capacitors as an example for the state of thyristor switching,
控制器以复合开关状态的动作过程将其他组三相电容器投入到10kV系统中,剩一组三相电容器工作在可控硅投切状态,控制器检测到三相真空断路器的合闸信号后,第三光电收发模块给第二三相真空接触器合闸信号,如果控制器没有接收到第三光电收发模块发出的合闸信号,则控制器发第二三相真空接触器拒动故障信号; The controller puts other groups of three-phase capacitors into the 10kV system in the action process of composite switch state, and the remaining group of three-phase capacitors works in the switching state of the thyristor. After the controller detects the closing signal of the three-phase vacuum circuit breaker , the third photoelectric transceiver module sends the closing signal to the second three-phase vacuum contactor, if the controller does not receive the closing signal from the third photoelectric transceiver module, the controller sends the second three-phase vacuum contactor a failure signal ;
如果控制器接收到第三光电收发模块发出的合闸信号,则控制器检测阀组故障和过零检测主板发出的过零信号和阀组故障信号,假如控制器未检测到阀组故障和过零检测主板发出的过零信号,控制器报同步信号故障;假如控制器检测到阀组故障和过零检测主板发出的有阀组故障信号,则控制器报阀组故障;当控制器检测到阀组故障和过零检测主板发出的过零信号后,控制器给高频脉冲电源触发信号,并检测高频脉冲电源是否有故障信号,假如高频脉冲电源有故障信号,控制器报电源故障信号,如果高频脉冲电源没有故障信号,则高频脉冲电源通过高压硅胶线给脉冲取能线圈供能,脉冲取能线圈通过可控硅触发盒驱动高压可控硅阀组中可控硅导通,则高压可控硅阀组导通, If the controller receives the closing signal sent by the third photoelectric transceiver module, the controller detects the valve group failure and zero crossing detection board sends the zero crossing signal and the valve group failure signal, if the controller does not detect the valve group failure and over If the zero-crossing signal sent by the zero-crossing detection board is sent by the controller, the controller will report a failure of the synchronous signal; After the zero-crossing signal sent by the valve group failure and zero-crossing detection main board, the controller sends a trigger signal to the high-frequency pulse power supply and detects whether there is a fault signal for the high-frequency pulse power supply. If there is a fault signal for the high-frequency pulse power supply, the controller reports a power failure signal, if the high-frequency pulse power supply has no fault signal, the high-frequency pulse power supply supplies energy to the pulse energy-taking coil through the high-voltage silicone wire, and the pulse energy-taking coil drives the thyristor conductor in the high-voltage thyristor valve group through the thyristor trigger box. If it is on, the high-pressure silicon controlled rectifier valve group will be on,
一组三相电容器投入到10kV系统中,切除时,控制器停止给高频脉冲电源触发信号,则高压可控硅阀组截止导通,一组三相电容器从10kV系统中切除;投切过程在20ms时间内完成。 A group of three-phase capacitors are put into the 10kV system. When cutting off, the controller stops triggering the high-frequency pulse power supply, then the high-voltage thyristor valve group is cut off and turned on, and a group of three-phase capacitors are cut off from the 10kV system; the switching process Completed within 20ms. the
10kV无冲击投切多组电容器组的复合开关工作在复合开关状态和综合状态可以综合的解决10kV系统无功补偿的要求,投切过程无冲击、无涌流,增加了三相电容器的寿命和机械开关的寿命,提高了系统供电的可靠性。 10kV non-impact switching multi-capacitor bank composite switch works in the composite switch state and comprehensive state, which can comprehensively solve the reactive power compensation requirements of the 10kV system. There is no impact and no inrush during the switching process, which increases the life and mechanical strength of the three-phase capacitors. The life of the switch improves the reliability of the system power supply. the
本实用新型带来的有益效果是,本实用新型提出了一种10kV无冲击投切多组电容器组的复合开关,该复合开关实现了一个阀组多组投切和阀组单组工作;三相电容器投切过程无冲击、无涌流,大大提高了三相电容器和机械开关的寿命,降低了投切三相电容器对系统的影响,提高供电的可靠性;另外,本实用新型所述的10kV无冲击投切多组电容器组的复合开关可以工作在“复合开关状态”、“机械开关状态”和“综合开关状态”三种工作模式下,实现对各种无功负荷的补偿,不过补,功率因数高,性价比高。 The beneficial effect brought by the utility model is that the utility model proposes a 10kV non-impact switching multi-group capacitor group composite switch, and the composite switch realizes multi-group switching of one valve group and single-group operation of the valve group; three There is no impact and no inrush during the switching process of phase capacitors, which greatly improves the life of three-phase capacitors and mechanical switches, reduces the impact of switching three-phase capacitors on the system, and improves the reliability of power supply; in addition, the 10kV described in the utility model The composite switch of multi-capacitor banks without impact switching can work in three working modes of "composite switch state", "mechanical switch state" and "comprehensive switch state" to realize compensation for various reactive loads. High power factor, high cost performance. the
附图说明 Description of drawings
图1是本实用新型所述的10kV无冲击投切多组电容器组的复合开关的结构示意图。 Fig. 1 is a structural schematic diagram of a composite switch for 10kV non-impact switching multi-group capacitor banks described in the present invention. the
具体实施方式 Detailed ways
具体实施方式一:参见图1说明本实施方式,本实施方式所述的10kV无冲击投切多组电容器组的复合开关,它包括第一光电收发模块1-1、控制器3、高压可控硅阀组2、高频脉冲电源4、脉冲取能线圈5、可控硅驱动盒6、阀组故障和过零检测主板7、三相真空断路器8和N个单元;
Specific embodiment one: Referring to Fig. 1 to illustrate this embodiment, the composite switch of 10kV non-impact switching multi-group capacitor banks described in this embodiment includes a first photoelectric transceiver module 1-1, a controller 3, a high-voltage controllable
所述的每个单元包括第二光电收发模块1-2、第三光电收发模块1-3、2个三相真空接触器、1个三相电抗器和1个三相电容器; Each of the units includes a second photoelectric transceiver module 1-2, a third photoelectric transceiver module 1-3, 2 three-phase vacuum contactors, a three-phase reactor and a three-phase capacitor;
所述的控制器3的第一控制信号输出端与第一光电收发模块1-1的控制信号输入端连接,该控制器3的第一状态信号输入端与第一光电收发模块1-1的状态信号输出端连接,所述的第一光电收发模块1-1的控制信号输出端与三相真空断路器8的控制端连接; The first control signal output end of the controller 3 is connected to the control signal input end of the first photoelectric transceiver module 1-1, and the first state signal input end of the controller 3 is connected to the first photoelectric transceiver module 1-1. The state signal output terminal is connected, and the control signal output terminal of the first photoelectric transceiver module 1-1 is connected to the control terminal of the three-phase vacuum circuit breaker 8;
所述控制器3的第二控制信号输出端与第二光电收发模块1-2的控制信号输入端连接,该控制器3的第二状态信号输入端与第二光电收发模块1-2的状态信号输出端连接,所述的第二光电收发模块1-2的控制信号输出端与第一三相真空接触器9-1的控制端连接; The second control signal output end of the controller 3 is connected with the control signal input end of the second photoelectric transceiver module 1-2, and the second state signal input end of the controller 3 is connected with the state of the second photoelectric transceiver module 1-2. The signal output terminal is connected, and the control signal output terminal of the second photoelectric transceiver module 1-2 is connected to the control terminal of the first three-phase vacuum contactor 9-1;
所述的控制器3的第三控制信号输出端与第三光电收发模块1-3的控制信号输入端连接,该控制器3的第三状态信号输入端与第三光电收发模块1-3的状态信号输出端连接,所述的第三光电收发模块1-3的控制信号输出端与第二三相真空接触器9-2的控制端连接; The third control signal output end of the controller 3 is connected to the control signal input end of the third photoelectric transceiver module 1-3, and the third state signal input end of the controller 3 is connected to the third photoelectric transceiver module 1-3. The status signal output terminal is connected, and the control signal output terminal of the third photoelectric transceiver module 1-3 is connected to the control terminal of the second three-phase vacuum contactor 9-2;
所述的控制器3的触发信号输出端与高频脉冲电源4的触发信号输入端连接,该控制器3的故障信号输入端与高频脉冲电源4的故障信号输出端连接,所述的高频脉冲电源4的电能信号输出端与阀组故障和过零检测主板7的电能信号输入端连接,所述的阀组故障和过零检测主板7的故障信号输出端与控制器3的阀组故障信号输入端连接,所述的阀组故障和过零检测主板7的过零信号输出端与控制器3的过零信号输入端连接,所述的高压可控硅阀组2的控制信号输出端与阀组故障和过零检测主板7的控制信号输入端连接,所述的高频脉冲电源4通过高压硅胶线穿过脉冲取能线圈5,所述的脉冲取能线圈5的一端与可控硅驱动盒6的信号输入端连接,所述的可控硅驱动盒6的驱动信号输出端与高压可控硅阀组2的驱动信号输入端连接, The trigger signal output end of described controller 3 is connected with the trigger signal input end of high-frequency pulse power supply 4, and the fault signal input end of this controller 3 is connected with the fault signal output end of high-frequency pulse power supply 4, and described high The power signal output end of the frequency pulse power supply 4 is connected with the power signal input end of the valve group fault and zero-crossing detection main board 7, and the fault signal output end of the valve group fault and zero-crossing detection main board 7 is connected with the valve group of the controller 3 The fault signal input terminal is connected, the zero-crossing signal output terminal of the valve group failure and zero-crossing detection main board 7 is connected with the zero-crossing signal input terminal of the controller 3, and the control signal output of the high-voltage thyristor valve group 2 is end is connected with the control signal input end of the valve group failure and zero-crossing detection main board 7, the high-frequency pulse power supply 4 passes through the pulse energy-taking coil 5 through a high-voltage silicone wire, and one end of the pulse energy-taking coil 5 can be connected with the The signal input end of the thyristor drive box 6 is connected, and the drive signal output end of the thyristor drive box 6 is connected with the drive signal input end of the high-voltage thyristor valve group 2,
所述的高压可控硅阀组2的三相输入端同时与三相真空断路器8的一端和第一三相真 空接触器9-1的一端连接,所述的三相真空断路器8的控制端与第一光电收发模块1-1的控制信号输出端连接,
The three-phase input end of the high-voltage
所述的高压可控硅阀组2的三相输出端与第二三相真空接触器9-2的一端连接,所述的第一三相真空接触器9-1的另一端同时与第二三相真空接触器9-2的另一端连接和三相电抗器的一端连接,所述的三相电抗器的另一端与三相电容器的一端连接。
The three-phase output end of the high-voltage
本实施方式中,所述的三相电容器用于无功补偿,所述的三相电抗器用于抑制谐波信号。 In this embodiment, the three-phase capacitor is used for reactive power compensation, and the three-phase reactor is used for suppressing harmonic signals. the
具体实施方式二:参见图1说明本实施方式,本实施方式与具体实施方式一所述的10kV无冲击投切多组电容器组的复合开关的区别在于,所述的N为大于或等于2的正整数。 Specific embodiment 2: Referring to Fig. 1 to illustrate this embodiment, the difference between this embodiment and the 10kV non-impact switching multi-group capacitor bank composite switch described in specific embodiment 1 is that the said N is greater than or equal to 2 positive integer. the
具体实施方式三:参见图1说明本实施方式,本实施方式与具体实施方式一或具体实施方式二所述的10kV无冲击投切多组电容器组的复合开关的区别在于,所述的高压可控硅阀组2为两相高压可控硅阀组,所述的两相高压可控硅阀组包括A相和C相。
Specific embodiment three: Referring to Fig. 1 to illustrate this embodiment, the difference between this embodiment and the 10kV non-impact switching multi-group capacitor bank composite switch described in specific embodiment 1 or
Claims (3)
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