WO2019007323A1 - 一种高压直流断路器的合成试验装置和方法 - Google Patents
一种高压直流断路器的合成试验装置和方法 Download PDFInfo
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- WO2019007323A1 WO2019007323A1 PCT/CN2018/094243 CN2018094243W WO2019007323A1 WO 2019007323 A1 WO2019007323 A1 WO 2019007323A1 CN 2018094243 W CN2018094243 W CN 2018094243W WO 2019007323 A1 WO2019007323 A1 WO 2019007323A1
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
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- Embodiments of the present invention relate to the field of power electronics, and in particular, to a composite test apparatus and method for a high voltage DC circuit breaker.
- High-voltage DC circuit breakers are still at the forefront of power electronics. There are no mature test standards for reference, and there are few developments for high-voltage DC circuit breakers.
- the mature high-voltage DC conversion switch test adopts the single-supply test method, which can complete the large-current breaking, but can not effectively reduce the thermal stress during the circuit breaker breaking process and recover the over-voltage after the breaking, and the versatility is poor.
- the embodiment of the invention provides a synthesizing test device and method for a high voltage DC circuit breaker, and tests a high voltage DC circuit under different working conditions through a steady state current test circuit, a high current test circuit and a high voltage test circuit.
- the embodiment of the invention provides a synthesis test device for a high-voltage DC circuit breaker, comprising a steady-state current test circuit, a high-current test circuit and a high-voltage test circuit, wherein the steady-state current test circuit, the high-current test circuit and the high-voltage test circuit are connected in parallel , in series with the high voltage DC circuit breaker.
- the steady state current test circuit includes an alternating current power supply, a thyristor rectifier bridge, and a wave reactance in series;
- the alternating current outputted by the alternating current power source is rectified by a thyristor rectifier bridge, and then a steady-state current is formed by a smoothing reactance.
- the steady-state current test circuit can provide the rated current and the overload current under the steady-state operating condition of the high-voltage DC circuit breaker, and is used for testing the current conducting capability of the high-voltage DC circuit breaker.
- the high current test circuit comprises a low voltage DC power supply, a low voltage capacitor, a resonant reactance and an isolating switch K1 connected in series;
- the capacitance of the low voltage capacitor is milli-level.
- the high current test circuit can adjust the current change rate and amplitude generated by the high voltage DC circuit breaker under fault conditions, and is used for testing the current breaking performance of the DC circuit breaker.
- the high voltage test circuit can provide a DC voltage that the high voltage DC circuit breaker needs to withstand, including a high voltage DC power supply, a high voltage capacitor and an isolating switch K2 connected in series;
- the capacitance of the high voltage capacitor is a micro-level.
- the synthetic test apparatus further includes a mechanical switch K3 connected in parallel across the high voltage DC circuit breaker.
- the high voltage DC circuit breaker is a mechanical high voltage DC circuit breaker, a solid state high voltage DC circuit breaker or a hybrid high voltage DC circuit breaker.
- the embodiment of the invention further provides a method for synthesizing a high-voltage DC circuit breaker by using the above-mentioned high-voltage DC circuit breaker synthetic test device, which comprises:
- the mechanical switch K3 is closed, and the steady-state current test circuit and the high-current test circuit are respectively tested to obtain the rated current under the steady-state operating condition of the high-voltage DC circuit breaker provided by the steady-state current test circuit, and the high voltage provided by the high-current test circuit.
- Triggering the steady-state current test circuit injecting a rated current into the high-voltage DC circuit breaker until the high-voltage DC circuit breaker reaches thermal equilibrium, and then triggering the high-current test circuit to inject a fault current into the circuit breaker under test;
- the high voltage test circuit is triggered during the segmentation process of the high voltage DC circuit breaker, and the high voltage DC circuit breaker breaking test is completed.
- the technical solution provided by the embodiment of the invention includes a steady state current test circuit, a high current test circuit and a high voltage test circuit, wherein the steady state current test circuit, the high current test circuit and the high voltage test circuit are connected in parallel, and the high voltage DC circuit breaker In series, the multi-power synthesis method is used to provide the current stress, voltage stress and thermal stress required for the test of the high-voltage DC circuit breaker, and the performance of the high-voltage DC circuit breaker under different working conditions can be fully tested;
- test capability of the technical solution provided by the embodiment of the invention can cover high-voltage DC circuit breakers of different technical routes such as mechanical high-voltage DC circuit breaker, solid-state high-voltage DC circuit breaker and hybrid high-voltage DC circuit breaker, and has wide application range;
- the technical solution provided by the embodiment of the invention can greatly reduce the capacity required of the test device, facilitate the construction of the test device, and lay a foundation for the application of the high voltage DC circuit breaker engineering and the development of test standards;
- the technical solution provided by the embodiment of the invention can realize the full voltage and full current breaking working condition of the high voltage DC circuit breaker by the timing matching of the three-part test circuit of the steady current current test circuit, the high current test circuit and the high voltage test circuit, and the breaking process
- the high current, voltage and thermal stress are highly equivalent to the actual system breaking, which can effectively verify the designed high-voltage DC circuit breaker breaking performance and design correctness;
- the technical solution provided by the embodiment of the invention can carry out multiple tests of continuous current operation, overload current operation, rated current closing, short circuit current closing, rated current breaking and short circuit current breaking of the high voltage DC circuit breaker, and the test capability Strong, overall good equivalence;
- the technical solution provided by the embodiment of the present invention has comprehensive functions, high integration, low capacity, and can also achieve expected current test, high test security and low input cost.
- FIG. 1 is a schematic structural view of a synthetic test device for a high voltage DC circuit breaker according to an embodiment of the present invention
- FIG. 2 is a structural view of a mechanical DC circuit breaker according to an embodiment of the present invention.
- FIG. 3 is a structural view of a solid-state high-voltage DC circuit breaker according to an embodiment of the present invention.
- FIG. 4 is a structural diagram of a hybrid high voltage DC circuit breaker according to an embodiment of the present invention.
- FIG. 5 is a schematic diagram of a breaking test method for a high-voltage DC circuit breaker synthetic test device according to an embodiment of the present invention
- FIG. 6 is a flow chart of a breaking test method for a high-voltage DC circuit breaker synthetic test device according to an embodiment of the present invention.
- the embodiment of the invention provides a synthetic test device for a high voltage DC circuit breaker.
- the synthetic test device 10 includes a steady state current test circuit 11 , a high voltage DC circuit breaker 12 , a high current test circuit 13 and a high voltage test circuit . 14.
- the steady state current test circuit 11, the high current test circuit 13 and the high voltage test circuit 14 are connected in parallel and connected in series with the high voltage DC circuit breaker 12.
- the steady-state current test circuit 11 includes an alternating current power supply, a thyristor rectifier bridge, and a smooth wave reactance in sequence; wherein the alternating current output from the alternating current power source is rectified by a thyristor rectifier bridge, and then a steady-state current is formed by the smoothing reactance.
- the steady-state current test circuit 11 mainly comprises an alternating current power supply, a thyristor rectifier bridge and a smooth wave reactance in series, it can provide the rated current and the overload current under the steady-state operating condition of the high-voltage DC circuit breaker, and is mainly used for testing. Current conduction capability of high voltage DC circuit breakers.
- the high current test circuit 13 described above includes a low voltage DC power supply, a low voltage capacitor, a resonant reactance, and an isolating switch K1 connected in series in series; the capacitance of the low voltage capacitor therein is a milli-level.
- the large current test circuit 13 includes a low-voltage DC power source, a low-voltage capacitor, a resonant reactance, and an isolating switch K1 which are sequentially connected in series, it is capable of adjusting a current change rate and a magnitude generated by a high-voltage DC circuit breaker under a faulty condition, and is mainly used. Test the DC breaker current breaking performance.
- the high-voltage test circuit 14 can provide the DC voltage that the high-voltage DC circuit breaker needs to withstand, and mainly includes a high-voltage DC power supply, a high-voltage capacitor and an isolating switch K2 connected in series, wherein the capacitance of the high-voltage capacitor is a micro-level.
- the synthetic test device provided by the embodiment of the present invention further includes a mechanical switch K3 connected in parallel at both ends of the high-voltage DC circuit breaker.
- the high-voltage DC circuit breaker described above may be a mechanical high-voltage DC circuit breaker, or may be a solid-state high-voltage DC circuit breaker or a hybrid high-voltage DC circuit breaker. among them:
- the structure of the mechanical high-voltage DC circuit breaker is as shown in FIG. 2, which includes a main branch 21, a transfer branch 22 and an energy absorption branch 23, wherein B represents an AC circuit breaker, C represents a capacitance, L represents a reactance, and MOV represents Lightning arrester, SC means the trigger switch, S means the isolating switch, Udc means the DC power supply.
- MOV 31 represents a lightning arrester, and after multiple IGBTs 32 are connected in series, they are connected in parallel with the arrester.
- the structure diagram of the hybrid high-voltage DC circuit breaker is shown in FIG. 4, wherein MOV represents a lightning arrester, K represents a fast mechanical switch, and the hybrid high-voltage DC circuit breaker mainly comprises a main branch 41, a transfer branch 42 and an energy dissipation branch 43.
- the main branch 41 includes a fast mechanical switch 411 and a full bridge module 412
- the transfer branch 42 of the ⁇ includes a plurality of full bridge modules 420 connected in series
- the energy dissipation branch 43 includes a plurality of arresters 430
- the arresters may be connected in series and then paralleled at both ends of the transfer branch, or a single arrester may be connected in parallel at both ends of the full bridge module in one or more transfer branches.
- the embodiment of the invention further provides a method for synthesizing a high-voltage DC circuit breaker by using the above-mentioned high-voltage DC circuit breaker synthetic test device.
- the schematic diagram of the method is shown in FIG. 5, wherein the solid line indicates the high-voltage DC circuit breaker current. Dotted line indicates the voltage of the high voltage DC circuit breaker terminal, the dotted line indicates the trigger time, T0 indicates the trigger time of the steady state current test circuit, T1 indicates the trigger time of the high current test circuit, T2 indicates the breaking time of the high voltage DC circuit breaker, and T3 indicates The triggering moment of the high voltage test circuit.
- the flow chart of the synthetic test method of the high-voltage DC circuit breaker is shown in Figure 6, and the process is as follows:
- S102 breaking the mechanical switch K3, triggering the high-voltage DC circuit breaker to be in a conducting state, charging the low-voltage capacitor through the low-voltage DC power source, and charging the high-voltage capacitor through the high-voltage DC power source;
- S103 triggering a steady-state current test circuit, injecting a rated current into the high-voltage DC circuit breaker until the high-voltage DC circuit breaker reaches thermal equilibrium, and then triggering the high-current test circuit to inject a fault current into the circuit breaker under test;
- the technical solution provided by the embodiment of the invention tests the performance of the high-voltage DC circuit breaker under different working conditions through the steady-state current test circuit, the high-current test circuit and the high-voltage test circuit, and the required test capacity is small, the test equivalence is high, and the high-voltage DC circuit is broken.
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Abstract
一种高压直流断路器的合成试验装置和方法，其中，该装置（10）包括稳态电流试验电路（11）、大电流试验电路（13）和高压试验电路（14），所述稳态电流试验电路（11）、大电流试验电路（13）和高压试验电路（14）并联后，与高压直流断路器（12）串联。
Description
相关申请的交叉引用
本申请基于申请号为201710543574.7、申请日为2017年07月05日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此以全文引入的方式引入本申请。
本发明实施例涉及电力电子技术领域，具体涉及一种高压直流断路器的合成试验装置和方法。
随着基于电压源换流器的多端柔性直流和直流电网技术的开始应用，高压直流断路器成为保证系统稳定安全可靠运行的关键设备之一，其运行的可靠性直接决定了所配置直流系统的安全性和经济性，因此需要对其开展全面试验，检验不同工况下直流断路器性能，验证所设计的高压直流断路器正确性以及是否满足要求的性能。
高压直流断路器尚属于电力电子领域前沿技术，目前尚无成熟的试验标准可以参考，也对高压直流断路器的研制也极少。而成熟的高压直流转化开关试验采用单电源试验方法，可以完成大电流分断，但无法有效等效断路器分断过程中热应力以及分断后恢复过电压，且通用性差。
发明内容
为了克服上述现有技术的不足，本发明实施例提供一种高压直流断路器的合成试验装置和方法，通过稳态电流试验电路、大电流试验电路和高 压试验电路测试不同工况下高压直流断路器性能，所需求试验容量小、试验等效性高，为高压直流断路器工程应用以及试验标准制定奠定基础。
本发明实施例采取如下技术方案：
本发明实施例提供一种高压直流断路器的合成试验装置，包括稳态电流试验电路、大电流试验电路和高压试验电路，所述稳态电流试验电路、大电流试验电路和高压试验电路并联后，与高压直流断路器串联。
所述稳态电流试验电路包括依次串联的交流电源、晶闸管整流桥和平波电抗；
所述交流电源输出的交流电经晶闸管整流桥进行整流，再经过平波电抗形成稳态电流。
所述稳态电流试验电路能够提供高压直流断路器稳态运行工况下的额定电流和过负荷电流，用于测试高压直流断路器的电流导通能力。
所述大电流试验电路包括依次串联的低压直流电源、低压电容、谐振电抗和隔离开关K1；
所述低压电容的容值为毫法级。
所述大电流试验电路能够调节高压直流断路器在故障工况下产生的电流变化率和幅值，用于测试直流断路器电流分断性能。
所述高压试验电路能够提供高压直流断路器分断所需要承受的直流电压，其包括依次串联的高压直流电源、高压电容和隔离开关K2；
所述高压电容的容值为微法级。
所述合成试验装置还包括机械开关K3，所述机械开关K3并联在高压直流断路器两端。
所述高压直流断路器为机械式高压直流断路器、固态式高压直流断路器或混合式高压直流断路器。
本发明实施例还提供一种采用上述高压直流断路器的合成试验装置进 行高压直流断路器的合成试验方法，包括：
闭合机械开关K3，对稳态电流试验电路和大电流试验电路分别进行测试，得到稳态电流试验电路提供的高压直流断路器稳态运行工况下的额定电流，以及大电流试验电路提供的高压直流断路器在故障工况下产生的电流变化率和幅值；
分断机械开关K3，触发高压直流断路器使其处于导通状态，通过低压直流电源给低压电容充电，并通过高压直流电源给高压电容充电；
触发稳态电流试验电路，向高压直流断路器注入额定电流，直至高压直流断路器达到热平衡，之后触发大电流试验电路，向被试断路器注入故障电流；
结合实际试验需求，在高压直流断路器的分段过程中触发高压试验电路，完成高压直流断路器分断试验。
与最接近的现有技术相比，本发明实施例提供的技术方案具有以下有益效果：
1)本发明实施例提供的技术方案包括稳态电流试验电路、大电流试验电路和高压试验电路，其中的稳态电流试验电路、大电流试验电路和高压试验电路并联后，与高压直流断路器串联，采用多电源合成的方式提供高压直流断路器试验所需要的电流应力、电压应力和热应力，能够全面测试不同工况下高压直流断路器性能；
2)本发明实施例提供的技术方案的试验能力能够覆盖诸如机械式高压直流断路器、固态式高压直流断路器和混合式高压直流断路器等不同技术路线的高压直流断路器，应用范围广泛；
3)本发明实施例提供的技术方案能够大大降低了试验装置所需要的容量，利于试验装置建设，为高压直流断路器工程应用以及试验标准制定奠定基础；
4)本发明实施例提供的技术方案通过稳态电流试验电路、大电流试验电路和高压试验电路三部分试验电路的时序配合，能够实现高压直流断路器全电压、全电流分断工况，分断过程中的电流、电压以及热应力与实际系统分断的等效性高，可有效验证所设计的高压直流断路器分断性能以及设计的正确性；
5)本发明实施例提供的技术方案可开展高压直流断路器的连续电流运行、过负荷电流运行、额定电流关合、短路电流关合、额定电流分断以及短路电流分断等多项测试，试验能力强，整体具备良好的等效性；
6)本发明实施例提供的技术方案功能全面，集成度高，容量低，还能实现预期电流的测试，试验安全性高，投入成本低。
图1是本发明实施例中高压直流断路器的合成试验装置结构示意图；
图2是本发明实施例中机械式直流断路器结构图；
图3是本发明实施例中固态式高压直流断路器结构图；
图4是本发明实施例中混合式高压直流断路器结构图；
图5是本发明实施例中高压直流断路器合成试验装置分断试验方法原理图；
图6是本发明实施例中高压直流断路器合成试验装置分断试验方法流程图。
下面结合附图对本发明实施例作进一步详细说明。
本发明实施例提供一种高压直流断路器的合成试验装置，如图1所示，该合成试验装置10包括稳态电流试验电路11、高压直流断路器12、大电流试验电路13和高压试验电路14，其中的稳态电流试验电路11、大电流 试验电路13和高压试验电路14并联后，与高压直流断路器12串联。
上述的稳态电流试验电路11包括依次串联的交流电源、晶闸管整流桥和平波电抗；其中的交流电源输出的交流电经晶闸管整流桥进行整流，再经过平波电抗形成稳态电流。
由于上述的稳态电流试验电路11主要包括依次串联的交流电源、晶闸管整流桥和平波电抗，所以其能够提供高压直流断路器稳态运行工况下的额定电流和过负荷电流，主要用于测试高压直流断路器的电流导通能力。
上述的大电流试验电路13包括依次串联的低压直流电源、低压电容、谐振电抗和隔离开关K1；其中的低压电容的容值为毫法级。
由于上述的大电流试验电路13包括依次串联的低压直流电源、低压电容、谐振电抗和隔离开关K1，所以其能够调节高压直流断路器在故障工况下产生的电流变化率和幅值，主要用于测试直流断路器电流分断性能。
上述的高压试验电路14能够提供高压直流断路器分断所需要承受的直流电压，其主要包括依次串联的高压直流电源、高压电容和隔离开关K2，其中的高压电容的容值为微法级。
除了上述的稳态电流试验电路、大电流试验电路和高压试验电路，本发明实施例提供的合成试验装置还包括机械开关K3，该机械开关K3并联在高压直流断路器两端。
上述的高压直流断路器可以为机械式高压直流断路器，还可以为固态式高压直流断路器或混合式高压直流断路器。其中：
机械式高压直流断路器的结构如图2所示，其包括主支路21、转移支路22和能量吸收支路23，其中的B表示交流断路器，C表示电容，L表示电抗，MOV表示避雷器，SC表示触发开关，S表示隔离开关，Udc表示直流电源。
固态式高压直流断路器的结构如图3所示，其中MOV 31表示避雷器， 多个IGBT 32串联后，与避雷器并联。
混合式高压直流断路器的结构图如图4所示，其中MOV表示避雷器，K表示快速机械开关，混合式高压直流断路器主要包括主支路41、转移支路42和能量耗散支路43，其中的主支路41包括快速机械开关411和全桥模块412，其中的转移支路42包括多个依次串联的全桥模块420，其中的能量耗散支路43包括多个避雷器430，多个避雷器可以先串联后再并联在转移支路的两端，也可以单个避雷器并联在一个或多个转移支路中全桥模块的两端。
本发明实施例还提供一种采用上述的高压直流断路器的合成试验装置进行高压直流断路器的合成试验方法，该方法的原理图如图5所示，其中实线表示高压直流断路器电流，点划线表示高压直流断路器端电压，虚线表示各个触发时刻，T0表示稳态电流试验回路的触发时刻，T1表示大电流试验电路的触发时刻，T2表示高压直流断路器的分断时刻，T3表示高压试验电路的触发时刻。该高压直流断路器的合成试验方法流程图如图6所示，其过程如下：
S101：闭合机械开关K3，对稳态电流试验电路和大电流试验电路分别进行测试，得到稳态电流试验电路提供的高压直流断路器稳态运行工况下的额定电流，以及大电流试验电路提供的高压直流断路器在故障工况下产生的电流变化率和幅值；
S102：分断机械开关K3，触发高压直流断路器使其处于导通状态，通过低压直流电源给低压电容充电，并通过高压直流电源给高压电容充电；
S103：触发稳态电流试验电路，向高压直流断路器注入额定电流，直至高压直流断路器达到热平衡，之后触发大电流试验电路，向被试断路器注入故障电流；
S104：结合实际试验需求，在高压直流断路器的分段过程中触发高压 试验电路，完成高压直流断路器分断试验。
应理解，说明书通篇中提到的“一个实施例”或“一实施例”意味着与实施例有关的特定特征、结构或特性包括在本发明的至少一个实施例中。因此，在整个说明书各处出现的“在一个实施例中”或“在一实施例中”未必一定指相同的实施例。此外，这些特定的特征、结构或特性可以任意适合的方式结合在一个或多个实施例中。应理解，在本发明的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本发明实施例的实施过程构成任何限定。上述本发明实施例序号仅仅为了描述，不代表实施例的优劣。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。
最后应当说明的是：以上实施例仅用以说明本发明的技术方案而非对其限制，所属领域的普通技术人员参照上述实施例依然可以对本发明的实施方式进行修改或者等同替换，这些未脱离本发明精神和范围的任何修改或者等同替换，均在申请待批的本发明的权利要求保护范围之内。
本发明实施例提供的技术方案通过稳态电流试验电路、大电流试验电路和高压试验电路测试不同工况下高压直流断路器性能，所需求试验容量小、试验等效性高，为高压直流断路器工程应用以及试验标准制定奠定基础。
Claims (9)
- 一种高压直流断路器的合成试验装置，包括稳态电流试验电路、大电流试验电路和高压试验电路，所述稳态电流试验电路、大电流试验电路和高压试验电路并联后，与高压直流断路器串联。
- 根据权利要求1所述的高压直流断路器的合成试验装置，所述稳态电流试验电路包括依次串联的交流电源、晶闸管整流桥和平波电抗；所述交流电源输出的交流电经晶闸管整流桥进行整流，再经过平波电抗形成稳态电流。
- 根据权利要求2所述的高压直流断路器的合成试验装置，所述稳态电流试验电路能够提供高压直流断路器稳态运行工况下的额定电流和过负荷电流，用于测试高压直流断路器的电流导通能力。
- 根据权利要求2所述的高压直流断路器的合成试验装置，所述大电流试验电路包括依次串联的低压直流电源、低压电容、谐振电抗和隔离开关K1；所述低压电容的容值为毫法级。
- 根据权利要求4所述的高压直流断路器的合成试验装置，所述大电流试验电路能够调节高压直流断路器在故障工况下产生的电流变化率和幅值，用于测试直流断路器电流分断性能。
- 根据权利要求4所述的高压直流断路器的合成试验装置，所述高压试验电路能够提供高压直流断路器分断所需要承受的直流电压，其包括依次串联的高压直流电源、高压电容和隔离开关K2；所述高压电容的容值为微法级。
- 根据权利要求1至6任一所述的高压直流断路器的合成试验装置，所述合成试验装置还包括机械开关K3，所述机械开关K3并联在高压直流断路器两端。
- 根据权利要求1至6任一所述的高压直流断路器的合成试验装置，所述高压直流断路器为机械式高压直流断路器、固态式高压直流断路器或混合式高压直流断路器。
- 一种采用权利要求6所述的高压直流断路器的合成试验装置进行高压直流断路器的合成试验方法，包括：闭合机械开关K3，对稳态电流试验电路和大电流试验电路分别进行测试，得到稳态电流试验电路提供的高压直流断路器稳态运行工况下的额定电流，以及大电流试验电路提供的高压直流断路器在故障工况下产生的电流变化率和幅值；分断机械开关K3，触发高压直流断路器使其处于导通状态，通过低压直流电源给低压电容充电，并通过高压直流电源给高压电容充电；触发稳态电流试验电路，向高压直流断路器注入额定电流，直至高压直流断路器达到热平衡，之后触发大电流试验电路，向被试断路器注入故障电流；结合实际试验需求，在高压直流断路器的分段过程中触发高压试验电路，完成高压直流断路器分断试验。
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| CN109061450B (zh) * | 2018-06-19 | 2021-02-09 | 北京平高清大科技发展有限公司 | 一种直流断路器用机械开关的试验电路 |
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| CN111141984B (zh) * | 2020-01-09 | 2020-10-30 | 北京航空航天大学 | 一种基于电弧电压的直流高压大电流合成实验回路及控制方法 |
| CN115453334A (zh) * | 2021-06-09 | 2022-12-09 | 国家电网有限公司 | 一种高压直流断路器分断试验装置及其使用方法 |
| CN115480155A (zh) * | 2021-06-16 | 2022-12-16 | 全球能源互联网研究院有限公司 | 一种开关器件的试验电路及试验方法 |
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