CN202649411U

CN202649411U - FCL circuit breaker undefined position alarm simulation device

Info

Publication number: CN202649411U
Application number: CN 201220134451
Authority: CN
Inventors: 杨增辉; 张旭航; 冯煜尧; 崔勇; 方陈
Original assignee: Shanghai Municipal Electric Power Co; East China Power Test and Research Institute Co Ltd
Current assignee: Shanghai Municipal Electric Power Co; East China Power Test and Research Institute Co Ltd
Priority date: 2012-04-01
Filing date: 2012-04-01
Publication date: 2013-01-02
Anticipated expiration: 2022-04-01

Abstract

The utility model discloses an FCL circuit breaker undefined position alarm simulation device which belongs to test field. The simulation device comprises a first, second and third logic 'and' modules, a logic 'or' module and a delay output module. The simulation device can truly simulate and reflect the condition of FCL device circuit breaker position protection action in real time, provides starting discrimination logic or trigger criterion of corresponding protection logic for the measurement control and protection system and simulates the action result, can be conveniently realized in a real environment or virtual environment, has the characteristics of cross-platform, easy realization and good reproducibility, and can be widely used for the fields of the research, design and manufacture of an FCL device protection system.

Description

FCL circuit breaker position ambiguity alarm simulation device

Technical Field

The utility model belongs to measure the field, especially, relate to a testing arrangement for electric property.

Background

The increasing demand for electric power has led to the development of transmission systems for long distances, large capacities and high stability. Safe and stable operation of the power system is an important premise for sustainable development of national economy.

Short circuit faults are one of the most common faults that compromise the safe and stable operation of a power system.

In recent years, with the continuous strengthening of the power grid structure in China, the level of short-circuit current is continuously increased. The short-circuit current level of the power grid in many areas, particularly in the coastal economically developed areas, approaches or even exceeds the switch interruption capacity, so that the safety and the stability of the operation of the power system are greatly stressed, and the short-circuit current level becomes one of the main bottlenecks in the development of the power grid.

To maintain stable power transmission, it is important to quickly remove short-circuit fault protection. A general mechanical circuit breaker requires two or more cycles including an action time of relay protection to cut off a short-circuit current, and a rapid current limiting device used together with the circuit breaker can shorten a fault protection time.

The principle of a series resonance Fault Current Limiter (FCL) is shown in fig. 1, and it mainly consists of a reactor L, a capacitor C, and a fast bypass switch K (which may be a switch of the type such as a thyristor, a spark gap, a fast mechanical switch, or a combination thereof).

And the power frequency inductive reactance of the reactor L is the same as the capacitive reactance of the capacitor C in size. Under the normal working condition, the switch K is in an open state (the thyristor is in a blocking state), the capacitor C and the inductor L are in a power frequency series resonance state, and the total impedance is zero. When a fault is detected, the switch K is rapidly closed (the thyristor is rapidly conducted), the capacitor is bypassed, and equivalently, the inductor L is connected into the circuit to play a role in limiting current.

Under normal conditions, the 'on-position effective' signal and the 'off-position effective' signal of the circuit breaker can only appear one type, and the 'off-position' or 'on-position' state corresponding to the circuit breaker can not appear at the same time.

In addition to the primary devices described above, the short-circuit fault detection, diagnosis and trigger control system is also an important component of the FCL apparatus. The measurement control protection system is a system for automatically measuring, controlling and protecting the main equipment of the FCL device, and the system is used for measuring the main electrical quantity and the operation state of the FCL device, controlling the operation state and monitoring and protecting the main equipment. The measurement control protection system is configured redundantly according to a dualization principle and has self-checking and self-diagnosis functions for the measurement control protection system and an external interface circuit.

During the research or design phase of an FCL device, the above-described system must be tested and simulated, and the results of the research or design must be verified or modified with reference to the results of the testing and simulation.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a FCL circuit breaker position is undefined and reports an emergency and asks for help or increased vigilance analogue means is provided, its action condition that can simulate really, reflect FCL device circuit breaker position is undefined and reports an emergency and asks for help or increased vigilance, provides corresponding simulation result for its research or design of measurement control protection system, provides the verification platform to the research or the design of fault current limiter.

The technical scheme of the utility model is that: the FCL breaker position ambiguity alarm simulation device is characterized in that: the simulation device is composed of 1 st to 3 rd logic AND modules, a logic OR module and a delay output module.

The 1 st input end of each of the 1 st to 3 rd logic AND modules is correspondingly connected with the 'on-position' effective signal and the 'off-position' effective signal of the A, B, C three-phase circuit breaker respectively; the 2 nd input ends of the 1 st to 3 rd logic AND modules are respectively and correspondingly connected with 'on-position' invalid signals and 'off-position' invalid signals of A, B, C three-phase circuit breakers; the output ends of the 1 st to 3 rd logic AND modules are correspondingly connected with the input end of the logic OR module; the output end of the logic OR module is correspondingly connected with the input end of the delay output module; and the output end of the delay output module outputs a circuit breaker position ambiguous alarm logic action result.

The logic AND module is an AND gate circuit.

The logic OR module is an OR gate circuit.

The delay output module is a delay circuit.

Further, the 1 st to 3 rd logic and modules, the logic or modules and the delay output modules are module circuits formed by discrete electronic components.

Or, the 1 st to 3 rd logic and modules, the logic or modules and the delay output module are module circuits formed by integrated circuit devices.

Compared with the prior art, the utility model has the advantages that:

1. the action condition of uncertain alarm of the FCL device breaker position can be simulated and reflected in real time and truly, the starting judgment logic or the triggering criterion of the corresponding protection logic is provided for the measurement control protection system, and the action result can be simulated;

2. the whole simulation device has concise logical relation, reliable action and easy realization;

3. in both real environments (implemented in real components) or virtual environments (implemented in computer software), with cross-platform, ease of implementation and good reproducibility.

Drawings

FIG. 1 is a schematic diagram of a fault current limiter;

FIG. 2 is a schematic view of the connection relationship between the components of the present invention;

fig. 3 is a schematic diagram of the logical relationship of the present apparatus.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

In fig. 1, the FCL device is mainly composed of a reactor L, a capacitor C, and a fast bypass switch K.

In fig. 2, the simulation apparatus is composed of 1 st to 3 rd logic and modules 4 to 6, a logic or module 7 and a delay output module 8.

The logic AND module is an AND gate circuit.

The logic OR module is an OR gate circuit.

The delay output module is a delay circuit.

Or, the 1 st to 3 rd logic and modules, the logic or modules and the delay output module are module circuits formed by software simulation function circuits.

The delay circuit can be a resistance-capacitance delay circuit, a 555 time-base circuit or a delay relay.

The and gate described above may be implemented using and integrated circuit 7411 or an integrated circuit chip that functions the same, and the or gate may be implemented using 4075 or an integrated circuit chip that functions the same.

In the figure, KHYa, KHYb and KHYc are respectively "on-position valid" signals of A, B, C three-phase circuit breakers, and FHWa, FHWb and FHWc are "off-position valid" signals of A, B, C three-phase circuit breakers.

Since the specific circuits constituting the functional circuits are all the prior art, those skilled in the art can completely use various discrete components, integrated circuits or analog circuits corresponding to the functions in computer software to construct the functional circuits, and therefore the specific circuit diagrams thereof are not described herein.

In fig. 3, a schematic diagram of the logical relationship of the present apparatus is given, and it is obvious that the logical relationship or the logical function can be implemented by actual electronic components (real environment) or by computer software (virtual environment).

Therefore, the device has the characteristics of cross-platform performance, easy realization and good reproducibility.

Because the utility model discloses can simulate, reflect the undefined warning action condition in FCL device circuit breaker position in real time, developments, all can realize in real environment (realize with actual component) or virtual environment (realize with computer software), provide the trigger criterion of protection action for FCL device protection system to can simulate its action result.

The utility model discloses can extensively be used for FCL device protection system's research, design, manufacturing field.

Claims

1. An FCL circuit breaker position ambiguity alarm simulation device is characterized in that:

the simulation device consists of 1 st to 3 rd logic AND modules, a logic OR module and a delay output module; wherein,

the 1 st input end of each of the 1 st to 3 rd logic AND modules is correspondingly connected with the 'on-position' effective signal and the 'off-position' effective signal of the A, B, C three-phase circuit breaker respectively;

the 2 nd input ends of the 1 st to 3 rd logic AND modules are respectively and correspondingly connected with 'on-position' invalid signals and 'off-position' invalid signals of A, B, C three-phase circuit breakers;

the output ends of the 1 st to 3 rd logic AND modules are correspondingly connected with the input end of the logic OR module;

the output end of the logic OR module is correspondingly connected with the input end of the delay output module;

and the output end of the delay output module outputs a circuit breaker position ambiguous alarm logic action result.

2. The FCL circuit breaker position ambiguity alarm emulation apparatus of claim 1, wherein said logical and block is an and gate.

3. The FCL circuit breaker position ambiguity alarm emulation apparatus of claim 1, wherein said logical or module is an or gate.

4. The FCL circuit breaker position ambiguity alarm simulation apparatus of claim 1, wherein said delay output module is a delay circuit.

5. The FCL circuit breaker position ambiguity alarm simulation apparatus of claim 1, wherein the 1 st to 3 rd logical and module, logical or module and delay output module are modular circuits formed by discrete electronic components.

6. The FCL circuit breaker position ambiguity alarm simulation apparatus of claim 1, wherein the 1 st to 3 rd logic and module, logic or module and delay output module are module circuits formed by integrated circuit devices.