CN102170115B - Real-time digital simulation system of electric power system - Google Patents
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Abstract
本发明提供一种电力系统的实时数字仿真系统，包括主台和多个分机，所述主台和所述多个分机均相连，所述电力系统的实时数字仿真系统还包括故障电流限制器的实时数字仿真系统，所述故障电流限制器的实时数字仿真系统位于所述主台和所述多个分机之间。本发明提供的电力系统的实时数字仿真系统中加入了故障电流限制器的实时数字仿真系统，可以有效的限制电力系统的短路电流，此外，仿真系统的建立促进了电力系统的分析和研究。
The present invention provides a real-time digital simulation system of a power system, which includes a main station and a plurality of extensions, the main station and the plurality of extensions are connected, and the real-time digital simulation system of the power system also includes a fault current limiter A real-time digital simulation system, the real-time digital simulation system of the fault current limiter is located between the main station and the plurality of substations. The real-time digital simulation system of the fault current limiter is added to the real-time digital simulation system of the power system provided by the invention, which can effectively limit the short-circuit current of the power system. In addition, the establishment of the simulation system promotes the analysis and research of the power system.
Description
技术领域 technical field
本发明涉及一种仿真系统，且特别涉及一种电力系统的实时数字仿真系统。The invention relates to a simulation system, and in particular to a real-time digital simulation system of an electric power system.
背景技术 Background technique
电力系统的安全稳定运行，是国民经济可持续发展的前提。由于受到内部和外部不可控因素的影响，电网事故时有发生，不但使电力企业受到损失，而且对整个社会都造成严重的影响。短路故障是危及电力系统安全稳定运行最为常见的故障之一。近年来，随着我国电网结构的不断加强，短路电流水平不断攀升。许多地区特别是沿海经济发达地区电网的短路电流水平已经逼近甚至超过其开关遮断容量，给电力系统安全稳定运行带来较大压力，并已成为电网发展的主要瓶颈之一。有效的开展故障电流限制器(FCL)解决电力系统短路电流超标问题的研究，可以对电网运行中的负荷配置、潮流安排及断路器的短路电流设计容量等进行正确的规划，从而产生相当的经济和社会效益。The safe and stable operation of the power system is the prerequisite for the sustainable development of the national economy. Due to the influence of internal and external uncontrollable factors, power grid accidents occur frequently, which not only cause losses to power companies, but also have a serious impact on the entire society. Short-circuit faults are one of the most common faults that endanger the safe and stable operation of power systems. In recent years, with the continuous strengthening of my country's power grid structure, the level of short-circuit current has continued to rise. In many areas, especially the economically developed coastal areas, the short-circuit current level of the power grid has approached or even exceeded its breaking capacity, which has brought great pressure to the safe and stable operation of the power system and has become one of the main bottlenecks in the development of the power grid. Effective research on fault current limiter (FCL) to solve the problem of excessive short-circuit current in power systems can make correct planning for load allocation, power flow arrangement and short-circuit current design capacity of circuit breakers during power grid operation, thereby generating considerable economic benefits. and social benefits.
发明内容 Contents of the invention
为了克服现有技术中短路电流对电力系统的影响，本发明提供了一种能够限制短路电流的电力系统的实时数字仿真系统。In order to overcome the influence of the short-circuit current on the power system in the prior art, the invention provides a real-time digital simulation system of the power system capable of limiting the short-circuit current.
为了实现上述目的，本发明提出一种电力系统的实时数字仿真系统，包括主台和多个分机，所述主台和所述多个分机均相连，所述电力系统的实时数字仿真系统还包括故障电流限制器的实时数字仿真系统，所述故障电流限制器的实时数字仿真系统位于所述主台和所述多个分机之间。In order to achieve the above object, the present invention proposes a real-time digital simulation system of an electric power system, including a main station and a plurality of extensions, the main station and the plurality of extensions are connected, and the real-time digital simulation system of the electric power system also includes A real-time digital simulation system of a fault current limiter, the real-time digital simulation system of a fault current limiter is located between the main station and the plurality of substations.
可选的，所述故障电流限制器包括：可控串联电容器补偿组件；第一串联电容补偿组件，和所述可控串联电容补偿组件相连；第二串联电容补偿组件，和所述可控串联电容补偿组件以及所述第一串联电容补偿组件均相连；第三串联电容补偿组件，和所述可控串联电容补偿组件、所述第一串联电容补偿组件以及所述第二串联电容补偿组件均相连。Optionally, the fault current limiter includes: a controllable series capacitor compensation component; a first series capacitor compensation component connected to the controllable series capacitor compensation component; a second series capacitor compensation component connected to the controllable series capacitor compensation component The capacitance compensation component and the first series capacitance compensation component are all connected; the third series capacitance compensation component is connected to the controllable series capacitance compensation component, the first series capacitance compensation component and the second series capacitance compensation component. connected.
可选的，所述可控串联电容器补偿组件由相互并联的三组可控串联电容器补偿单元组成。Optionally, the controllable series capacitor compensation component is composed of three groups of controllable series capacitor compensation units connected in parallel.
可选的，所述第一串联电容补偿组件、所述第二串联电容补偿组件和所述第三串联电容补偿组件均由相互并联的三组串联电容补偿单元组成。Optionally, the first series capacitance compensation component, the second series capacitance compensation component and the third series capacitance compensation component are all composed of three sets of series capacitance compensation units connected in parallel.
可选的，所述串联电容补偿单元有相互并联的变阻器、电容器组合和旁路开关组成。Optionally, the series capacitance compensation unit is composed of a rheostat, a capacitor combination and a bypass switch connected in parallel.
可选的，所述变阻器为金属氧化物变阻器。Optionally, the varistor is a metal oxide varistor.
可选的，所述故障电流限制器还包括多组开关，所述开关设置于所述第二串联电容补偿组件和所述可控串联电容补偿组件之间以及所述第三串联电容补偿组件和所述可控串联电容补偿组件之间。Optionally, the fault current limiter further includes a plurality of sets of switches, and the switches are arranged between the second series capacitance compensation component and the controllable series capacitance compensation component and between the third series capacitance compensation component and the controllable series capacitance compensation component. Between the controllable series capacitance compensation components.
可选的，所述电力系统为500kV的电力系统。Optionally, the power system is a 500kV power system.
由于采用了上述技术方案，与现有技术相比，本发明故障电流限制器的实时数字仿真系统具有以下优点：本发明提供的电力系统的实时数字仿真系统中加入了故障电流限制器的实时数字仿真系统，可以有效的限制电力系统的实时数字仿真系统中的短路电流，此外，电力系统的实时数字仿真系统的建立促进了电力系统的分析和研究。Due to the above-mentioned technical scheme, compared with the prior art, the real-time digital simulation system of the fault current limiter of the present invention has the following advantages: the real-time digital simulation system of the fault current limiter is added in the real-time digital simulation system of the power system provided by the present invention The simulation system can effectively limit the short-circuit current in the real-time digital simulation system of the power system. In addition, the establishment of the real-time digital simulation system of the power system promotes the analysis and research of the power system.
附图说明 Description of drawings
图1为本发明电力系统的实时数字仿真系统的结构框图。Fig. 1 is a structural block diagram of the real-time digital simulation system of the power system of the present invention.
图2为故障电流限制器的结构示意图。Figure 2 is a schematic diagram of the structure of the fault current limiter.
图3为本发明电力系统的实时数字仿真系统中的故障电流限制器实时数字仿真系统的结构框图。Fig. 3 is a structural block diagram of the real-time digital simulation system of the fault current limiter in the real-time digital simulation system of the power system of the present invention.
图4为本发明电力系统的实时数字仿真系统中的故障电流限制器实时数字仿真系统的结构示意图。Fig. 4 is a structural schematic diagram of the real-time digital simulation system of the fault current limiter in the real-time digital simulation system of the power system of the present invention.
图5为本发明电力系统的实时数字仿真系统中的故障电流限制器实时数字仿真系统的局部放大图。Fig. 5 is a partial enlarged view of the real-time digital simulation system of the fault current limiter in the real-time digital simulation system of the power system of the present invention.
图6为本发明电力系统的实时数字仿真系统中的故障电流限制器实时数字仿真系统的可控串联电容器补偿单元结构示意图。Fig. 6 is a structural schematic diagram of the controllable series capacitor compensation unit of the real-time digital simulation system of the fault current limiter in the real-time digital simulation system of the power system of the present invention.
具体实施方式 Detailed ways
下面，结合附图对本发明做进一步的说明。Below, the present invention will be further described in conjunction with the accompanying drawings.
首先，请参考图1，图1为本发明电力系统的实时数字仿真系统的结构框图，包括主台112和多个分机110，本实施例中分机的数量为四个，所述主台112和所述多个分机110均相连，电力系统的实时数字仿真系统还包括故障电流限制器的实时数字仿真系统111，所述故障电流限制器的实时数字仿真系统111位于所述主台112和所述多个分机110之间。主台112和分机110均为现有技术，不再赘言，下面，详细介绍故障电流限制器的实时数字仿真系统111。First of all, please refer to Fig. 1, Fig. 1 is the structural block diagram of the real-time digital simulation system of the power system of the present invention, comprises master station 112 and a plurality of extensions 110, the quantity of extensions is four in the present embodiment, described master station 112 and The plurality of extensions 110 are all connected, and the real-time digital simulation system of the power system also includes a real-time digital simulation system 111 of a fault current limiter, and the real-time digital simulation system 111 of the fault current limiter is located between the main station 112 and the Between multiple extensions 110. Both the master station 112 and the extension station 110 are in the prior art, so no more details will be given. Next, the real-time digital simulation system 111 of the fault current limiter will be introduced in detail.
接着，请参考图2，图2为故障电流限制器的结构示意图。从图2中可以看到，故障电流限制器(FCL)主要组件及功能如下：(1)限流电抗器32(FL)，在短路期间起到限流作用；(2)电容器组(C1、C2、C3、C4)，在正常工作条件下补偿短路限流器感抗；系统短路期间被快速旁路。(3)晶闸管阀40，这是旁路电容器的首要措施。当发生短路故障后会快速导通，旁路掉电容器组，使电抗器起到限流作用。(4)可控火花间隙37(GAP)，是电容器组的过电压保护装置。短路故障下，如果晶闸管导通失败电容器组电压迅速上升到危及电容器安全的水平，则火花间隙便能够迅速动作。(5)旁路机械开关39(BCB)，在几十毫秒内实现电容器的可靠短接，也为电容器组投入、退出操作提供手段。(6)金属氧化物变阻器36(MOV)，是电容器组过电压保护的必要措施之一。(7)阻尼回路38(DL、DR、DG)，限制并阻尼放电电流，确保电容器组、晶闸管阀、火花间隙、旁路断路器的安全运行。(8)旁路刀闸34(MBS)及第一隔离刀闸33(DS1)、第二隔离刀闸35(DS2)，为系统操作及检修提供手段。Next, please refer to FIG. 2 , which is a schematic structural diagram of a fault current limiter. As can be seen from Figure 2, the main components and functions of the fault current limiter (FCL) are as follows: (1) the current limiting reactor 32 (FL), which acts as a current limiter during a short circuit; (2) the capacitor bank (C1, C2, C3, C4), to compensate the inductive reactance of the short circuit current limiter under normal operating conditions; it is quickly bypassed during the system short circuit. (3) Thyristor valve 40, which is the primary measure for bypassing capacitors. When a short-circuit fault occurs, it will be quickly turned on, bypassing the capacitor bank, and making the reactor play a role of current limiting. (4) The controllable spark gap 37 (GAP) is an overvoltage protection device for the capacitor bank. Under short-circuit fault, if the thyristor fails to conduct and the voltage of the capacitor bank rises rapidly to a level that endangers the safety of the capacitor, the spark gap can act quickly. (5) The bypass mechanical switch 39 (BCB) realizes reliable short-circuiting of the capacitor within tens of milliseconds, and also provides a means for putting in and out of the capacitor bank. (6) The metal oxide varistor 36 (MOV) is one of the necessary measures for the overvoltage protection of the capacitor bank. (7) The damping circuit 38 (DL, DR, DG) limits and damps the discharge current to ensure the safe operation of capacitor banks, thyristor valves, spark gaps, and bypass circuit breakers. (8) The bypass switch 34 (MBS), the first isolation switch 33 (DS1), and the second isolation switch 35 (DS2) provide means for system operation and maintenance.
接着，请参考图3，图3为本发明电力系统的实时数字仿真系统中的故障电流限制器实时数字仿真系统的结构框图，包括：可控串联电容器补偿组件10；第一串联电容补偿组件11，和所述可控串联电容补偿组件10相连；第二串联电容补偿组件12，和所述可控串联电容补偿组件10以及所述第一串联电容补偿组件11均相连；第三串联电容补偿组件13，和所述可控串联电容补偿组件10、所述第一串联电容补偿组件11以及所述第二串联电容补偿组件12均相连。Next, please refer to Fig. 3, Fig. 3 is the structural block diagram of the real-time digital simulation system of the fault current limiter in the real-time digital simulation system of the power system of the present invention, including: a controllable series capacitor compensation assembly 10; a first series capacitance compensation assembly 11 , connected to the controllable series capacitance compensation component 10; the second series capacitance compensation component 12, connected to the controllable series capacitance compensation component 10 and the first series capacitance compensation component 11; the third series capacitance compensation component 13 , connected to the controllable series capacitance compensation component 10 , the first series capacitance compensation component 11 and the second series capacitance compensation component 12 .
图4为本发明电力系统的实时数字仿真系统中的故障电流限制器实时数字仿真系统的结构示意图，从图4可以看到，可控串联电容器补偿组件由相互并联的三组可控串联电容器补偿单元55组成，所述系统还包括多组开关，本实施例中共设置了四组开关(51、52、53、54)，所述开关设置于所述第二串联电容补偿组件和所述可控串联电容补偿组件之间以及所述第三串联电容补偿组件和所述可控串联电容补偿组件之间。Fig. 4 is the structure diagram of the real-time digital simulation system of the fault current limiter in the real-time digital simulation system of the power system of the present invention, as can be seen from Fig. 4, the controllable series capacitor compensation component is compensated by three groups of controllable series capacitors connected in parallel unit 55, the system also includes a plurality of sets of switches, four sets of switches (51, 52, 53, 54) are set in this embodiment, and the switches are set in the second series capacitance compensation component and the controllable Between the series capacitance compensation components and between the third series capacitance compensation component and the controllable series capacitance compensation component.
下面，请参考图5，图5为本发明电力系统的实时数字仿真系统中的故障电流限制器实时数字仿真系统的局部放大图。具体说来，是第一串联电容补偿组件、第二串联电容补偿组件或者第三串联电容补偿组件的结构示意图，从图中看到，上述提及的串联电容补偿组件包括均由相互并联的三组串联电容补偿单元41组成，所述串联电容补偿单元41有相互并联的变阻器43、电容器42组合和旁路开关44组成，其中变阻器优选的，为金属氧化物变阻器。Next, please refer to FIG. 5 , which is a partial enlarged view of the real-time digital simulation system of the fault current limiter in the real-time digital simulation system of the power system of the present invention. Specifically, it is a structural schematic diagram of the first series capacitance compensation component, the second series capacitance compensation component or the third series capacitance compensation component. It can be seen from the figure that the series capacitance compensation components mentioned above include three parallel connected A series capacitance compensation unit 41 is composed of a series capacitance compensation unit 41 composed of a varistor 43 connected in parallel, a combination of capacitors 42 and a bypass switch 44, wherein the varistor is preferably a metal oxide varistor.
最后请参考图6，图6为本发明电力系统的实时数字仿真系统中的故障电流限制器实时数字仿真系统的可控串联电容器补偿单元结构示意图。该结构为现有技术，从图上可以看出该补偿单元包括晶闸管45、限流电抗器46、变阻器47等，在此对该结构不再赘言。Finally, please refer to FIG. 6 . FIG. 6 is a structural diagram of the controllable series capacitor compensation unit of the fault current limiter real-time digital simulation system in the real-time digital simulation system of the power system of the present invention. This structure is a prior art, and it can be seen from the figure that the compensation unit includes a thyristor 45, a current-limiting reactor 46, a rheostat 47, etc., and the structure will not be repeated here.
在上述提供的实时数字仿真系统中，第一串联电容补偿组件、第二串联电容补偿组件和第三串联电容补偿组件主要用于对限流电抗、串联电容、阻尼回路和MOV元件的仿真建模；可控串联电容器补偿组件(TCSC)组件用于晶闸管阀组、放电间隙、旁路开关和故障电流限制器内部故障的仿真建模；四组开关用于故障电流限制器退出运行时的两把开断刀闸和故障电流限制器旁路刀闸，由此就完整的建成了与故障电流限制器完全匹配的实时数字仿真系统。In the real-time digital simulation system provided above, the first series capacitance compensation component, the second series capacitance compensation component and the third series capacitance compensation component are mainly used for simulation modeling of current limiting reactance, series capacitance, damping loop and MOV element ; Controllable Series Capacitor Compensation Component (TCSC) component is used for simulation modeling of internal faults of thyristor valve group, discharge gap, bypass switch and fault current limiter; four sets of switches are used for two switches when the fault current limiter is out of operation Breaking the knife switch and bypassing the knife switch by the fault current limiter, thus a real-time digital simulation system that fully matches the fault current limiter is completely built.
本发明提供的电力系统的实时数字仿真系统中加入了故障电流限制器的实时数字仿真系统，可以有效的限制电力系统的短路电流，此外，仿真系统的建立方便了电力系统的分析和研究。The real-time digital simulation system of the fault current limiter is added to the real-time digital simulation system of the power system provided by the invention, which can effectively limit the short-circuit current of the power system. In addition, the establishment of the simulation system facilitates the analysis and research of the power system.
虽然本发明已以较佳实施例揭露如上，然其并非用以限定本发明。本发明所述技术领域中具有通常知识者，在不脱离本发明的精神和范围内，当可作各种的更动与润饰。因此，本发明的保护范围当视权利要求书所界定者为准。Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Those skilled in the technical field of the present invention may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the claims.
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|---|---|
| CN102170115A (en) | 2011-08-31 |
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