CN104569802A - Intelligent substation debugging system and primary isolating switch analog equipment - Google Patents

Abstract

The invention discloses an intelligent substation debugging system and a primary isolating switch simulation device. The primary isolating switch simulation device includes: a first wire connected to a positive power supply; a second wire connected to a negative power supply; a two-position relay, the two-position relay Including: the first coil for action and the second coil for reset; the first input terminal and the second input terminal for connecting to the negative power supply; multiple sets of contact test terminals; the first coil triggers the button through the opening connected to the first wire; the second coil is connected to the first wire through the trigger button; the first input is connected to the second wire; the second input is connected to the first Two wires are connected; wherein, a set of contact test terminals includes: a normally closed contact and a normally open contact; the conduction state of the normally closed contact is opposite to the conduction state of the normally open contact. The invention greatly reduces the cost and occupied space.

Description

An intelligent substation debugging system and a primary isolating switch simulation device

technical field

The invention relates to the technical field of intelligent substations, in particular to an intelligent substation debugging system and a primary isolating switch simulation device.

Background technique

As one of the basic links of the smart grid, the smart substation is the hub of smart grid energy transmission, the most important source of modern grid operation information, the execution place of grid intelligent operation control, and the foundation and key of sputtering a strong smart grid. The smart substation has a unified data model and communication platform for the whole station. The digital communication between the primary equipment and the secondary equipment in the substation is realized, and the interoperability between intelligent devices is realized on the basis of this platform.

The primary equipment and secondary equipment of the smart substation need to be tested after assembly to test the performance of different contact states. In the prior art, when performing a performance test on an isolating switch, if it is necessary to perform the test after the isolating switch is installed, it is necessary to simulate a circuit breaker or simulate an isolating switch instrument and equipment. However, this instrument is used for the test of isolating switches in smart substations. The cost is high, ranging from tens of thousands of yuan to millions of yuan, and it occupies a large space. It is not suitable for the integration testing of smart secondary equipment in smart substations, especially for advanced function and implementation. Therefore, in the current smart substation debugging field, it is a problem to be solved urgently to provide a primary isolating switch simulation device used for the isolating switch integration test of the primary equipment.

Contents of the invention

In order to solve the above problems, the present invention provides a smart substation and its primary isolating switch simulation equipment, the primary isolating switch simulation equipment can be used for switch state control of the isolating switch of the smart substation, with low cost and small space occupation.

In order to achieve the above object, the present invention provides a primary isolating switch simulation device of a smart substation. The smart substation has a plurality of isolating switches during integration testing, and the primary isolating switch simulation device includes:

Connect the first wire of the positive power supply;

A second wire connected to the negative power supply;

A two-position relay, the two-position relay includes: a first coil for action and a second coil for reset, the first coil is interlocked with the second coil and the second coil; it is used to connect a negative power supply The first input terminal and the second input terminal; multiple sets of contact test terminals;

The first coil is connected to the first wire through an opening trigger button; the second coil is connected to the first wire through a closing trigger button;

The first input end is connected to the second electric wire; the second input end is connected to the second electric wire;

Wherein, a group of contact test terminals includes: a normally closed contact and a normally open contact; the conduction state of the normally closed contact is opposite to that of the normally open contact.

Preferably, in the above-mentioned primary isolating switch simulation device, it also includes: a set of indicator lights; the set of indicator lights includes: a green indicator light for opening and a red indicator light for closing;

Both the positive input end of the opening green indicator light and the positive input end of the closing red indicator light are connected to the first electric wire;

The negative input end of the green indicator light for opening and the negative input end of the red indicator light for closing are connected to the same group of contact test terminals; and the negative input end of the green indicator light for opening is connected to the red indicator light for closing One of the negative input terminals of the negative pole is connected to a normally closed contact for indicating the conduction state of the normally closed contact, and the other is connected to a normally open contact for indicating the conduction state of the normally open contact.

Preferably, in the above-mentioned primary isolating switch simulation device, each group of contact test terminals is correspondingly provided with a set of said indicator lights.

Preferably, in the above primary isolating switch simulation device, the positive power supply is connected to the first electric wire through a positive power supply air switch.

Preferably, in the above primary isolating switch simulation device, the negative power supply is connected to the second electric wire through a negative power supply air switch.

Preferably, in the above-mentioned primary isolating switch simulation device, in the same group of contact test terminals, the normally closed contact and the normally open contact are connected to the same isolating switch for performance testing of different conduction states of the power station equipment;

Or, the normally closed contact is connected to the first isolating switch, and the normally open contact is connected to the second isolating switch for testing the performance of the first isolating switch with respect to the conduction state of the second isolating switch being opposite test, wherein the first isolator is a different isolator than the second isolator.

Preferably, in the above primary isolating switch analog device, the positive power supply is used for outputting a DC +110V voltage, and the negative power supply is used for outputting a DC -110V voltage.

Preferably, in the above primary isolating switch analog device, the positive power supply is used to output a DC +55V voltage, and the negative power supply is used to output a DC -55V voltage.

The present invention also provides an intelligent substation debugging system, which includes the primary isolating switch simulation device described in any one of the above items.

It can be known from the above description that the primary isolating switch simulation device described in the technical solution of the present invention includes: the first wire connected to the positive power supply; the second wire connected to the negative power supply; a two-position relay, and the two-position relay includes: The first coil and the second coil for reset, the first coil and the second coil and the second coil are mutually blocked; the first input terminal and the second input terminal for connecting to a negative power supply; multiple sets of contact tests terminal; the first coil is connected to the first wire through the opening trigger button; the second coil is connected to the first wire through the closing trigger button; the first input terminal is connected to the second wire connection; the second input terminal is connected to the second electric wire; wherein, a group of contact test terminals include: a normally closed contact and a normally open contact; the conduction state of the normally closed contact is related to the normally open The conduction state of the contacts is reversed. Using the two-position relay to systematically realize different performance tests on the isolating switch, compared with using analog switches or analog circuit breaker equipment, greatly reduces the cost and occupies space.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Fig. 1 is the structural representation of a kind of primary isolating switch simulation equipment provided by the present invention;

Fig. 2 is a schematic structural diagram of an intelligent substation debugging system provided by the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Referring to FIG. 1 , FIG. 1 is a schematic structural diagram of a primary isolating switch simulation device of a smart substation provided by an embodiment of the present application. The smart substation has a plurality of isolating switches. The primary disconnect switch simulation equipment includes:

connected to the first electric wire L1 of the positive power supply P;

a second wire L2 connected to the negative power supply N;

Two-position relay KJJ, the two-position relay KJJ includes: a first coil for action and a second coil for reset, the first coil is interlocked with the second coil and the second coil to form a single coil A locking coil that can be in a state of action and reset; the first input terminal A and the second input terminal B used to connect to the negative power supply N; multiple sets of contact test terminals;

The first coil RST (opening action) for action is connected to the positive power supply P with the first electric wire L1 through the opening trigger button T1; the second coil TRJP (closing action) for resetting is through the closing trigger button T2 Connect the positive power supply P to the first electric wire L1; T1 and T2 can be electrical remote control commands and execution contacts triggered by other intelligent secondary equipment and automatic monitoring equipment in the intelligent substation;

The first input terminal A is connected to the second electric wire L2; the second input terminal B is connected to the second electric wire L2;

Wherein, a group of contact test terminals includes: a normally closed contact and a normally open contact; the conduction state of the normally closed contact is opposite to that of the normally open contact.

The two-position relay KJJ shown in FIG. 1 has four locking coils 1J, 2J, 3J and 4J, and each locking coil has an action coil and a reset coil that are mutually locked. A locking coil has a set of contact test terminals, and a set of contact test terminals has a pair of normally closed contacts and a pair of normally open contacts. There are 4 sets of contact test terminals in Figure 1, including: the first set of contact test terminals, corresponding to the locking coil 1J, with normally closed contacts 1J-1 and normally open contacts 1J-2; the second set of contact test terminals The test terminal, corresponding to the locking coil 2J, has a normally closed contact 2J-1 and a normally open contact 2J-2; the third set of contact test terminals, corresponding to the locking coil 3J, has a normally closed contact 3J-1 and a normally open contact 3J-2; the fourth group of contact test terminals, corresponding to the locking coil 4J, has a normally closed contact 4J-1 and a normally open contact 4J-2.

According to the working characteristics of the two-position relay, when the opening trigger button T1 is closed, the normally closed contacts of each group will be closed, and the corresponding normally open contacts will be disconnected; when the closing trigger button T2 is closed, the normally closed contacts of each group will be closed. The contacts will open and the corresponding normally open contacts will close. The actual action of the isolating switch is simulated by the two-position relay, the result is intuitive and clear, the cost is low, and the space occupied is small.

The primary isolating switch simulation device utilizes the characteristics that the conduction state of the normally closed contacts of the same group of contact test ends of the double-position relay is opposite to that of the normally open contacts, so as to realize the performance test of the isolating switch under different switching states , Compared with using analog switches or analog circuit breakers, the cost and occupied space are greatly reduced.

In this embodiment, the primary isolating switch simulation device further includes: a set of indicator lights; the set of indicator lights includes: a green indicator light MD1 for opening and a red indicator light MD2 for closing.

Wherein, the positive input terminal of the opening green indicator light MD1 and the positive input terminal of the closing red indicator light MD2 are both connected to the first electric wire L1; the negative input terminal of the opening green indicator light MD1 is connected to the The negative input terminal of the closing red indicator light MD2 is connected to the same group of contact test terminals; the negative input terminal of the opening green indicator light MD1 is connected to a normally closed contact, which is used to indicate the conduction state of the normally closed contact; The negative input end of the closing red indicator light MD2 is connected to a normally closed contact for indicating the conduction state of the normally closed contact, and the other is connected to a normally open contact for indicating the state of the normally open contact. conduction state.

The opening green indicator light MD1 and the closing red indicator light MD2 are different from the light-emitting colors, so as to distinguish whether the indicator light corresponds to a normally closed contact or a normally open contact action, and corresponds to the opening or closing of an isolating switch. gate status.

In the embodiment shown in Figure 1, only one group of contact test terminals is provided with indicator lights, and in practical applications, other groups of contact test terminals can be set as intelligent secondary equipment such as relay protection high-voltage protection devices, measurement and control It is used for displaying the opening and closing status of primary isolating switches such as devices and monitoring systems.

In this embodiment, the positive power supply P is connected to the first electric wire L1 through the positive power supply air switch K1. The negative power supply N is connected to the second wire L2 through a negative power supply air switch K2. In order to facilitate the control, the two-position relay KJJ has different working voltage levels, ±220V and ±110V are optional, so as to ensure the smooth development of the work. In this embodiment, the two-position relay KJJ is suitable for 110V-242V AC and DC power supply.

The positive power supply is used to output a DC +110V voltage, and the negative power supply is used to output a DC -110V voltage. At this time, the two-position relay KJJ inputs an operating voltage of ±220V. Or, the positive power supply is used to output DC +55V voltage, and the negative power supply is used to output DC -55V voltage. At this time, the two-position relay KJJ inputs ±110V working voltage. The positive power supply and the negative power supply can be powered by a DC screen to provide a set working voltage.

The primary isolating switch simulation device in this embodiment includes: a power supply of the simulation device, a two-position relay, an indicator light for indicating the status of the simulation device, an on-off button for simulation operation, and the like. The two-position relay KJJ includes: a locking coil for simulating the opening and closing contactor of a primary isolating switch in a smart substation, such as 1J, 2J, 3J, and 4J in the figure, and a contact for simulating the opening and closing state of a primary isolating switch such as 1J- 1, 1J-2, 2J-1, 2J-2, 3J-1, 3J-2, 4J-1, 4J-2.

The two-position relay KJJ has terminal 1-terminal 20. The wiring of the present invention is that terminal No. 10 (the first input terminal A) and terminal No. 20 (the second input terminal B) are connected to the DC negative power supply. Press the closing trigger button T2, the No. 1 terminal TRIP is connected to positive electricity, the two ends of No. 1 to No. 10 terminals are charged, the coil operates, and the original closed contacts of 1J-1, 2J-1, 3J-1, and 4J-1 are opened , the normally closed contacts of the simulated knife position are open, the contacts of 1J-2, 2J-2, 3J-2, and 4J-2 are closed, and the normally open contacts of the simulated knife position are closed. At the same time, the red indicator light MD2 is on, and the green indicator light MD1 is off. Press the opening trigger button T1, the terminal 11 TRIP is connected to the positive power supply, the terminals 11 to 20 are charged at both ends, and the position of the contact is opposite to that of the traffic lights. The contact output is used for different position indication and display, as well as the anti-calibration input function necessary for the remote control isolating switch.

If a variety of transmission and advanced function tests are completed in the integration test stage, a large number of simulated primary equipment is required. Traditionally, a complete set of simulated equipment (which can simulate isolating switches and circuit breakers) provided by secondary equipment manufacturers can be purchased. Secondary equipment The analog circuit breaker equipment provided by the manufacturer is complex, has many functions, and is huge in size. It is not suitable for large-scale analog substation primary equipment isolation switches (a typical 220kV substation isolation switch can reach more than 100). The use of complete sets of equipment requires a huge investment and occupies an area Wide, it may take up 6 to 7 screen positions, which can be reduced to one to two screens after adopting this invention. The application greatly reduces the cost and occupied space, and greatly improves the testing efficiency.

From the above description, it can be seen that the primary isolating switch simulation device described in the embodiment of the present application uses a two-position relay to realize the performance test of the isolating switch in different switching states, which greatly reduces the cost compared with using an analog switch or an analog circuit breaker. and take up space.

The embodiment of the present application also provides a smart substation, which includes the above-mentioned primary isolation switch simulation device.

Specifically refer to Fig. 2, Fig. 2 is the structure schematic diagram of a kind of intelligent substation commissioning system provided by the embodiment of the present application, this commissioning system is only the commissioning center of the substation, this commissioning system includes: primary isolating switch simulation equipment 21, display output A control device 22, an intelligent secondary device 23, and a monitoring host.

A group of contact test terminals of the primary isolating switch simulation device 21 are connected to the display output control device 22 . By using the display output control device 22 as a display cabinet, the opening and closing operation control of the primary isolating switch simulation device 21 can be performed. The display output control device 22 can also acquire the position display information of the current relay state of the primary isolation switch simulation device 21 .

Another set of contact test terminals of the primary isolating switch simulation device 21 is connected to the intelligent secondary device 23 . The intelligent secondary device 23 can remotely control the primary isolation switch simulation device 21 , and the primary isolation switch simulation device 21 can provide a position signal for the intelligent secondary device 23 .

The intelligent secondary device 23 is connected with the monitoring host 24 . The monitoring host 24 can remotely control the intelligent secondary device 23 , and the intelligent secondary device 23 can provide a position signal for the monitoring host 24 .

The primary isolating switch simulation device 21 is the primary isolating switch simulation device described in the above-mentioned embodiments. When performing performance testing and performance debugging on the first isolating switch, the switching state of the isolating switch can be realized without using an analog switch and an analog isolating switch. Control, simple operation, low cost, small footprint.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. a disconnector analog machine of intelligent substation, has multiple disconnector during described intelligent substation integration testing, it is characterized in that, this disconnector analog machine comprises:

Connect the first electric wire of positive supply;

Connect the second electric wire of negative supply;

Two-position relay, described two-position relay comprises: the first coil for action and the second coil for involution, described first coil and described second coil and the mutual locking of the second coil; For connecting first input end and second input end of negative supply; Many groups contact test lead;

Described first coil is connected with described first electric wire by separating brake trigger button; Described second coil is connected with described first electric wire by combined floodgate trigger button;

Described first input end is connected with described second electric wire; Described second input end is connected with described second electric wire;

Wherein, one group of contact test lead comprises: normally closed contact and normally opened contact; The conducting state of described normally closed contact is contrary with the conducting state of described normally opened contact.

2. a disconnector analog machine according to claim 1, is characterized in that, also comprise: pilot lamp group; Described pilot lamp group comprises: separating brake green indicating lamp and combined floodgate red led;

The electrode input end of described separating brake green indicating lamp is all connected described first electric wire with the electrode input end of described combined floodgate red led;

The negative input of described separating brake green indicating lamp is connected same group of contact test lead with the negative input of described combined floodgate red led; And the negative input of described separating brake green indicating lamp is connected normally closed contact with in the negative input of described combined floodgate red led, be used to indicate the conducting state of described normally closed contact, another connects normally opened contact, is used to indicate the conducting state of described normally opened contact.

3. a disconnector analog machine according to claim 2, is characterized in that, the equal correspondence of each group contact test lead arranges pilot lamp group described in.

4. a disconnector analog machine according to claim 1, is characterized in that, described positive supply is connected with described first electric wire by positive supply air switch.

5. a disconnector analog machine according to claim 1, is characterized in that, described negative supply is connected with described second electric wire by negative supply air switch.

6. a disconnector analog machine according to claim 1, is characterized in that, in same group of contact test lead, described normally closed contact and normally opened contact connect same disconnector, for the performance test of the different conducting state of this power station equipment;

Or, described normally closed contact connects the first disconnector, described normally opened contact connects the second disconnector, for testing described first disconnector in the performance test of described second disconnector when conducting state is contrary, wherein, described first disconnector in described second disconnector be different disconnectores.

7. a disconnector analog machine according to claim 1, is characterized in that, described positive supply is for exporting direct current+110V voltage, and described negative supply is for exporting direct current-110V voltage.

8. a disconnector analog machine according to claim 1, is characterized in that, described positive supply is for exporting direct current+55V voltage, and described negative supply is for exporting direct current-55V voltage.

9. an intelligent substation debug system, is characterized in that, comprises a disconnector analog machine as described in any one of claim 1-8.