Wide-range high-back-pressure heat supply system and operation method thereof

The invention discloses a wide-range high-back-pressure heat supply system and an operation method thereof. The wide-area high-back-pressure heat supply system comprises a first heat exchange passage and a second heat exchange passage, a low-pressure cylinder discharges steam to provide a heat source for the first heat exchange passage and the second heat exchange passage, and a high-pressure condenser and a low-pressure condenser are arranged on the first heat exchange passage and the second heat exchange passage respectively. The water outlet end of the high-pressure condenser is connected with the water outlet end of the low-pressure condenser, the cold side inlet end of the heat supply network heat exchanger and the cold side outlet end of the heat supply network heat exchanger through pipelines. By arranging the high-pressure condenser and the low-pressure condenser, adjusting the steam exhaust flow of the high-pressure condenser and the low-pressure condenser and arranging the circulating cooling water