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Low-voltage emergency safety power supply system of household garbage power plant and control method of system

A security power supply and household waste technology, which is applied in the direction of emergency power supply arrangement, power network operating system integration, information technology support system, etc., can solve problems such as power failure, 0Ⅲ load power failure, and difficulty in AC security power supply

Pending Publication Date: 2017-05-10
YUNNANWATER INVESTMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the power supply reliability of substations sent to regional power grids is not as high as that of national grid hub substations, and it is very difficult to access independent AC security power from external power grids in places far away from urban areas
In extreme cases, if the substation of the power supply bureau connected to the power plant fails and loses power, and at the same time the AC security power connected to the external power grid also loses power, resulting in complete power loss of class 0Ⅲ loads

Method used

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  • Low-voltage emergency safety power supply system of household garbage power plant and control method of system
  • Low-voltage emergency safety power supply system of household garbage power plant and control method of system
  • Low-voltage emergency safety power supply system of household garbage power plant and control method of system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Such as figure 2 As shown, a control method for the low-voltage emergency security power supply system of the above-mentioned domestic waste power plant, specifically:

[0076] When the plant voltage monitoring result shows a loss of voltage, first trip the circuit breakers QF22 and QF011, and then close the circuit breakers QF02 and QF013;

[0077] According to the importance of the load, the DCS system puts in the AC security load in batches, and then the DCS runs the safety shutdown program to perform a safe shutdown;

[0078] Then monitor the voltage of the 10KV Ⅱ busbar. When the monitoring result is voltage loss, continue monitoring. When the monitoring result is qualified, close the circuit breaker QF22;

[0079] The circuit breaker QF011 is monitored at the same time. When the monitoring circuit breaker QF011 cannot be closed, continue to monitor the circuit breaker QF011; when the monitoring circuit breaker QF011 can be closed, close the circuit breaker QF011...

Embodiment 2

[0082] Such as image 3 As shown, a control method for the low-voltage emergency security power supply system of the above-mentioned domestic waste power plant, specifically:

[0083] When the external power supply voltage monitoring shows a loss of voltage, first trip the circuit breaker QF22 and QF011, and then close the circuit breaker QF012 after starting the security diesel generator set;

[0084] According to the importance of the load, the DCS system puts in the AC security load in batches, and then the DCS runs the safety shutdown program to perform a safe shutdown;

[0085] Then monitor the voltage of the 10KV Ⅱ busbar. When the monitoring result is voltage loss, continue monitoring. When the monitoring result is qualified, close the circuit breaker QF22;

[0086] The circuit breaker QF011 is monitored at the same time. When the monitoring circuit breaker QF011 cannot be closed, continue to monitor the circuit breaker QF011; when the monitoring circuit breaker QF011 ...

Embodiment 3

[0089] Such as Figure 4 As shown, a control method for the low-voltage emergency security power supply system of the above-mentioned domestic waste power plant, specifically:

[0090] When the 10KV security power supply is restored and the plant power loses voltage, first monitor the 10KV 0 bus voltage, and when the monitoring result is voltage loss, continue monitoring; when the monitoring result is qualified, close the circuit breaker QF02;

[0091]The circuit breaker QF013 is monitored at the same time. When the monitoring circuit breaker QF013 cannot be closed, continue to monitor the circuit breaker QF013; when the monitoring circuit breaker QF013 can be closed, close the circuit breaker QF013, and then trip the circuit breaker QF012;

[0092] Then monitor the voltage of the 10KV Ⅱ busbar. When the monitoring result is voltage loss, continue monitoring. When the monitoring result is qualified, close the circuit breaker QF22;

[0093] The circuit breaker QF011 is monitor...

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Abstract

The invention relates to a low-voltage emergency safety power supply system of a household garbage power plant and a control method of the system. According to the system, a 10KV 0 bus is connected with a 10KV safety power supply through a switch QF01; the 10KV 0 bus is connected with a 400V 0 bus through a switch QF02, a safety transformer AT0 and a switch QF013 in sequence; a safety diesel generating unit is connected with the 400V 0 bus through switches QF014 and QF012; a 10KV II bus is connected with the 400V 0 bus through a switch QF22, a standby transformer AT5 and a switch QF011 in sequence; the 10KV 0 bus is further connected with a 0 bus PT; and the 10KV safety power supply is further connected with a metering PT. According to the safety power supply system and the control method, under the condition that an external power grid loses plant power due to a fault, the unit can be safely stopped and equipment ensuring personal safety can run normally, so that the independence and the stability are improved, and the expense for setting up a special independent power supply from an external power grid is reduced.

Description

technical field [0001] The invention belongs to the technical field of power supply, and in particular relates to a low-voltage emergency security power supply system of a domestic garbage power plant and a control method thereof, in particular to a low-voltage emergency security power supply system of a small domestic garbage power plant. Background technique [0002] The design of the electrical part of waste-to-energy plants is generally carried out in accordance with the technical specifications of small-scale thermal power plants. The utility power loads of power plants are divided into 0-type loads and non-0-type loads according to their importance to personal and equipment safety. In case of power outage, the electric loads that directly affect the safety of human life and important equipment are called category 0 loads, and the rest of the electricity loads are also called non-zero loads. Class 0 loads are divided into the following three categories according to thei...

Claims

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Application Information

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IPC IPC(8): H02J9/08
CPCH02J9/08Y04S20/20Y02B70/30
Inventor 高伟罗宇煊邹新国张传健叶峰陈亮
Owner YUNNANWATER INVESTMENT CO LTD
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