JPH0591149U - Synchronous closing circuit - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a synchronous closing circuit that can automatically select a generator for synchronously closing a power receiving circuit breaker in a power generation facility having a plurality of generators. [Structure] A plurality of generator output detectors 11 to 14 that detect the outputs of a plurality of generators 2 and 3, and the output of each generator output detector 11 to 14 are input, and input values and respective A comparison and detection device 10 is provided which compares the ratings of the generators 2 and 3 with each other to select a generator having a margin and issues an increase / decrease command of voltage and frequency to the selected generator.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a synchronous closing circuit for automatically selecting a generator to be used in a system including a plurality of generators and performing a synchronous closing operation.

[0002]

[Prior Art]

 FIG. 2 is a circuit diagram of a conventional synchronous closing circuit, in which 1 is a power purchase, 2 is a No. 1 generator, 3 is a No. 2 generator, 4 is a power receiving breaker, and 5 is a No. 1 generator breaker. 6 is a No. 2 electric circuit breaker, 7 and 8 are PTs for synchronization detection, and 9 is an automatic synchronization closing device.

Next, the operation will be described. When the power receiving circuit breaker 4 is to be turned on synchronously, the automatic detection switch PTs 7, 7 and 8 give an increase / decrease command of voltage and frequency to the generator (G1 or G2) by the automatic synchronous closing device 9 to achieve synchronization, and the switch is turned on. A command is given to the power breaker 4, and the synchronization is completed.

[0004]

[Problems to be solved by the device]

 Since the conventional synchronous closing circuit is configured as described above, there is a problem that a worker must intervene in selecting the generator to be synchronized and a specialist engineer is required.

The present invention has been made in order to solve the above problems, and it is possible to obtain a synchronous closing circuit which can automatically select an appropriate generator and can simplify the synchronous closing operation. To aim.

[0006]

[Means for Solving the Problems]

 The synchronizing circuit according to the present invention takes in the outputs of a plurality of generators to a comparison and detection device, compares them with the generator ratings, and automatically selects an appropriate generator for the synchronous operation.

[0007]

[Action]

 The synchronizing circuit in this invention automatically selects a generator suitable for synchronizing operation.

[0008]

【Example】

 Example 1. Embodiment 1 of the present invention will be described below with reference to the drawings. In FIG. 1, which shows a synchronization closing circuit according to the first embodiment of the present invention, 1 to 9 are almost the same as the conventional ones, and therefore the explanation thereof will be omitted. 11, 12, 13, and 14 are transformers that detect the output of each generator 2 and 3, and 10 is a comparison detector that compares the generator output detected by these transformers 11 to 14 with the rated capacity of each generator. It is a device.

Next, the operation will be described. When the power receiving circuit breaker 4 is turned on synchronously, the automatic synchronism closing device 9 gives an increase / decrease command for voltage and frequency by means of the synchronization verification PTs 7, 7 and 8. In this case, for detecting the output of the generators 2 and 3. The generator output is taken into the comparative detector 10 by the transformers 11, 12, 13 and 14, and there is a margin compared with the generator rating. Select generator 2 or 3 and give a command to increase / decrease the voltage and frequency to perform the synchronous closing operation.

Furthermore, if the synchronization is not completed by the above operation, or if the voltage and frequency cannot be increased or decreased by exceeding the generator rating, the output is switched to the remaining generators to perform the synchronous operation. continue.

Example 2. In addition, in the first embodiment, the case of two generators is shown, but the same effect can be obtained in the case of two or more generators. Further, in the first embodiment, the case of the power receiving circuit breaker is shown, but the same effect can be obtained even in the case of other circuit breakers, for example, the bus bar connection circuit breaker.

[0012]

As described above, according to the present invention, since it is configured to detect the generator output by comparison with the rating and automatically select an appropriate generator, it is necessary to simplify the synchronous operation.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a configuration of a synchronization closing circuit according to a first embodiment of the present invention.

FIG. 2 is a circuit diagram of a conventional synchronization closing circuit.

[Explanation of symbols] 1 Power purchase 2 No. 1 generator 3 No. 2 generator 4 Power receiving circuit breaker 5 No. 1 generator circuit breaker 6 No. 2 generator circuit breaker 7 PT 8 for synchronization verification PT 9 Automatic synchronization insertion Device 10 Comparison detection device 11 Generator output detection transformer 12 Generator output detection transformer 13 Generator output detection transformer 14 Generator output detection transformer

Claims (1)

[Scope of utility model registration request] 1. A synchronous closing circuit for synchronously closing a power receiving circuit breaker in a power generation facility having a plurality of generators,
Multiple generator output detectors that detect the output of multiple generators and the output of each generator output detector are input, and the input value is compared with the rating of each generator. A synchronous closing circuit provided with a comparison detection device which selects a certain generator and issues an increase / decrease command of voltage and frequency to the selected generator.